Minor fix in the Redactor styling

modules/backend/assets/less/controls/forms.less

@@ -62,7 +62,7 @@ label {
     font-size: 13px;
 
     &:focus {
-        border: 1px solid @color-form-field-border-focus;
+        border: 1px solid @color-form-field-border-focus!important;
     }
 
     &.icon {

modules/backend/formwidgets/richeditor/assets/css/richeditor.css

@@ -36,4 +36,9 @@
   border-bottom-left-radius: 0;
   background: #f6f6f6;
   border-bottom: 1px solid #e0e0e0;
+  -webkit-box-shadow: none;
+  box-shadow: none;
+}
+.field-richeditor .redactor_box iframe {
+  border: none;
 }

modules/backend/formwidgets/richeditor/assets/less/richeditor.less

@@ -25,6 +25,10 @@
             .border-bottom-radius(0);
             background: @color-form-editor-toolbar;
             border-bottom: 1px solid @color-form-field-border;
+            .box-shadow(none);
+        }
+        iframe {
+            border: none;
         }
     }
 }