diff --git a/CHANGELOG.md b/CHANGELOG.md
index 80c66ae8d..46cb6bf75 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+* **Build 279** (2015-07-14)
+  - Plugins can now be frozen to prevent them from receiving updates via the plugin management area.
+  - A plugin version can now be flagged as "Important" by prepending `!!!` to the version history comment.
+
 * **Build 275** (2015-07-04)
   - List columns now support specifying a `default` option used when the value would otherwise be null.
   - Implement a custom autoloader for plugins that use composer. Now only one instance of composer is used, all packages are now added to a global pool to prevent double loading and the load order is respected.
diff --git a/modules/backend/assets/js/october-min.js b/modules/backend/assets/js/october-min.js
index 9227d21d0..c74267e8f 100644
--- a/modules/backend/assets/js/october-min.js
+++ b/modules/backend/assets/js/october-min.js
@@ -4095,27 +4095,29 @@ if(this.options.triggerCondition.indexOf('value')==0){var match=this.options.tri
 this.triggerCondition='value'
 this.triggerConditionValue=(match)?match:""}
 this.triggerParent=this.options.triggerClosestParent!==undefined?$el.closest(this.options.triggerClosestParent):undefined
-if(this.triggerCondition=='checked'||this.triggerCondition=='value'){$(document).on('change',this.options.trigger,$.proxy(this.onConditionChanged,this))}
+if(this.triggerCondition=='checked'||this.triggerCondition=='unchecked'||this.triggerCondition=='value'){$(document).on('change',this.options.trigger,$.proxy(this.onConditionChanged,this))}
 var self=this
 $el.on('oc.triggerOn.update',function(e){e.stopPropagation()
 self.onConditionChanged()})
 self.onConditionChanged()}
-TriggerOn.prototype.onConditionChanged=function(){if(this.triggerCondition=='checked'){this.updateTarget($(this.options.trigger+':checked',this.triggerParent).length>0)}
-else if(this.triggerCondition=='value'){var trigger=$(this.options.trigger+':checked',this.triggerParent),needle=trigger.length?trigger.val():$(this.options.trigger,this.triggerParent).val()
-this.updateTarget($.inArray(needle,this.triggerConditionValue)!=-1)}}
-TriggerOn.prototype.updateTarget=function(status){if(this.options.triggerAction=='show')
-this.$el.toggleClass('hide',!status).trigger('hide.oc.triggerapi',[!status])
-else if(this.options.triggerAction=='hide')
-this.$el.toggleClass('hide',status).trigger('hide.oc.triggerapi',[status])
-else if(this.options.triggerAction=='enable')
-this.$el.prop('disabled',!status).trigger('disable.oc.triggerapi',[!status]).toggleClass('control-disabled',!status)
-else if(this.options.triggerAction=='disable')
-this.$el.prop('disabled',status).trigger('disable.oc.triggerapi',[status]).toggleClass('control-disabled',status)
-else if(this.options.triggerAction=='empty'&&status)
-this.$el.trigger('empty.oc.triggerapi').val('')
-if(this.options.triggerAction=='show'||this.options.triggerAction=='hide')
-this.fixButtonClasses()
+TriggerOn.prototype.onConditionChanged=function(){if(this.triggerCondition=='checked'){this.updateTarget(!!$(this.options.trigger+':checked',this.triggerParent).length)}
+else if(this.triggerCondition=='unchecked'){this.updateTarget(!$(this.options.trigger+':checked',this.triggerParent).length)}
+else if(this.triggerCondition=='value'){var trigger,triggerValue=''
+trigger=$(this.options.trigger,this.triggerParent).not('input[type=checkbox], input[type=radio], input[type=button], input[type=submit]')
+if(!trigger.length){trigger=$(this.options.trigger,this.triggerParent).not(':not(input[type=checkbox]:checked, input[type=radio]:checked)')}
+if(!!trigger.length){triggerValue=trigger.val()}
+this.updateTarget($.inArray(triggerValue,this.triggerConditionValue)!=-1)}}
+TriggerOn.prototype.updateTarget=function(status){var self=this,actions=this.options.triggerAction.split('|')
+$.each(actions,function(index,action){self.updateTargetAction(action,status)})
 $(window).trigger('resize')}
+TriggerOn.prototype.updateTargetAction=function(action,status){if(action=='show'){this.$el.toggleClass('hide',!status).trigger('hide.oc.triggerapi',[!status])}
+else if(action=='hide'){this.$el.toggleClass('hide',status).trigger('hide.oc.triggerapi',[status])}
+else if(action=='enable'){this.$el.prop('disabled',!status).toggleClass('control-disabled',!status).trigger('disable.oc.triggerapi',[!status])}
+else if(action=='disable'){this.$el.prop('disabled',status).toggleClass('control-disabled',status).trigger('disable.oc.triggerapi',[status])}
+else if(action=='empty'&&status){this.$el.not('input[type=checkbox], input[type=radio], input[type=button], input[type=submit]').val('')
+this.$el.not(':not(input[type=checkbox], input[type=radio])').prop('checked',false)
+this.$el.trigger('empty.oc.triggerapi').trigger('change')}
+if(action=='show'||action=='hide'){this.fixButtonClasses()}}
 TriggerOn.prototype.fixButtonClasses=function(){var group=this.$el.closest('.btn-group')
 if(group.length>0&&this.$el.is(':last-child'))
 this.$el.prev().toggleClass('last',this.$el.hasClass('hide'))}
diff --git a/modules/system/assets/ui/docs/input-trigger.md b/modules/system/assets/ui/docs/input-trigger.md
index bf27e124b..18e61aab0 100644
--- a/modules/system/assets/ui/docs/input-trigger.md
+++ b/modules/system/assets/ui/docs/input-trigger.md
@@ -8,6 +8,7 @@ The API allows to change elements' visibility or status (enabled/disabled) basin
 - data-trigger: a CSS selector for elements that trigger the action (checkboxes)
 - data-trigger-condition, values:
     - checked: determines the condition the elements specified in the data-trigger should satisfy in order the condition to be considered as "true".
+    - unchecked: inverse condition of "checked".
     - value[somevalue]: determines if the value of data-trigger equals the specified value (somevalue) the condition is considered "true".
 - data-trigger-closest-parent: optional, specifies a CSS selector for a closest common parent for the source and destination input elements.
 
@@ -18,6 +19,14 @@ Example code:
         data-trigger="#cblist input[type=checkbox]"
         data-trigger-condition="checked" ... >
 
+Multiple actions are supported:
+
+    data-trigger-action="hide|empty"
+
+Multie value conditions are supported:
+
+    data-trigger-condition="value[foo][bar]"
+
 ### Supported events:
 
 - oc.triggerOn.update - triggers the update. Trigger this event on the element the plugin is bound to to 
diff --git a/modules/system/assets/ui/js/input.trigger.js b/modules/system/assets/ui/js/input.trigger.js
index d86b2263b..7a5fd6653 100644
--- a/modules/system/assets/ui/js/input.trigger.js
+++ b/modules/system/assets/ui/js/input.trigger.js
@@ -35,7 +35,11 @@
             ? $el.closest(this.options.triggerClosestParent)
             : undefined
 
-        if (this.triggerCondition == 'checked' || this.triggerCondition == 'value') {
+        if (
+            this.triggerCondition == 'checked' ||
+            this.triggerCondition == 'unchecked' ||
+            this.triggerCondition == 'value'
+        ) {
             $(document).on('change', this.options.trigger, $.proxy(this.onConditionChanged, this))
         }
 
@@ -50,34 +54,83 @@
 
     TriggerOn.prototype.onConditionChanged = function() {
         if (this.triggerCondition == 'checked') {
-            this.updateTarget($(this.options.trigger + ':checked', this.triggerParent).length > 0)
+            this.updateTarget(!!$(this.options.trigger + ':checked', this.triggerParent).length)
+        }
+        else if (this.triggerCondition == 'unchecked') {
+            this.updateTarget(!$(this.options.trigger + ':checked', this.triggerParent).length)
         }
         else if (this.triggerCondition == 'value') {
-            var trigger = $(this.options.trigger + ':checked', this.triggerParent),
-                needle = trigger.length ? trigger.val() : $(this.options.trigger, this.triggerParent).val()
+            var trigger, triggerValue = ''
 
-            this.updateTarget($.inArray(needle, this.triggerConditionValue) != -1)
+            trigger = $(this.options.trigger, this.triggerParent)
+                .not('input[type=checkbox], input[type=radio], input[type=button], input[type=submit]')
+
+            if (!trigger.length) {
+                trigger = $(this.options.trigger, this.triggerParent)
+                    .not(':not(input[type=checkbox]:checked, input[type=radio]:checked)')
+            }
+
+            if (!!trigger.length) {
+                triggerValue = trigger.val()
+            }
+
+            this.updateTarget($.inArray(triggerValue, this.triggerConditionValue) != -1)
         }
     }
 
     TriggerOn.prototype.updateTarget = function(status) {
-        if (this.options.triggerAction == 'show')
-            this.$el.toggleClass('hide', !status).trigger('hide.oc.triggerapi', [!status])
-        else if (this.options.triggerAction == 'hide')
-            this.$el.toggleClass('hide', status).trigger('hide.oc.triggerapi', [status])
-        else if (this.options.triggerAction == 'enable')
-            this.$el.prop('disabled', !status).trigger('disable.oc.triggerapi', [!status]).toggleClass('control-disabled', !status)
-        else if (this.options.triggerAction == 'disable')
-            this.$el.prop('disabled', status).trigger('disable.oc.triggerapi', [status]).toggleClass('control-disabled', status)
-        else if (this.options.triggerAction == 'empty' && status)
-            this.$el.trigger('empty.oc.triggerapi').val('')
+        var self = this,
+            actions = this.options.triggerAction.split('|')
 
-        if (this.options.triggerAction == 'show' || this.options.triggerAction == 'hide')
-            this.fixButtonClasses()
+        $.each(actions, function(index, action) {
+            self.updateTargetAction(action, status)
+        })
 
         $(window).trigger('resize')
     }
 
+    TriggerOn.prototype.updateTargetAction = function(action, status) {
+        if (action == 'show') {
+            this.$el
+                .toggleClass('hide', !status)
+                .trigger('hide.oc.triggerapi', [!status])
+        }
+        else if (action == 'hide') {
+            this.$el
+                .toggleClass('hide', status)
+                .trigger('hide.oc.triggerapi', [status])
+        }
+        else if (action == 'enable') {
+            this.$el
+                .prop('disabled', !status)
+                .toggleClass('control-disabled', !status)
+                .trigger('disable.oc.triggerapi', [!status])
+        }
+        else if (action == 'disable') {
+            this.$el
+                .prop('disabled', status)
+                .toggleClass('control-disabled', status)
+                .trigger('disable.oc.triggerapi', [status])
+        }
+        else if (action == 'empty' && status) {
+            this.$el
+                .not('input[type=checkbox], input[type=radio], input[type=button], input[type=submit]')
+                .val('')
+
+            this.$el
+                .not(':not(input[type=checkbox], input[type=radio])')
+                .prop('checked', false)
+
+            this.$el
+                .trigger('empty.oc.triggerapi')
+                .trigger('change')
+        }
+
+        if (action == 'show' || action == 'hide') {
+            this.fixButtonClasses()
+        }
+    }
+
     TriggerOn.prototype.fixButtonClasses = function() {
         var group = this.$el.closest('.btn-group')