Translate the value of the text field (#2942)

It is a useful feature, if you like to add translatable value.

modules/backend/widgets/form/partials/_field_text.htm

@@ -6,11 +6,11 @@
         type="text"
         name="<?= $field->getName() ?>"
         id="<?= $field->getId() ?>"
-        value="<?= e($field->value) ?>"
+        value="<?= e(trans($field->value)) ?>"
         placeholder="<?= e(trans($field->placeholder)) ?>"
         class="form-control"
         autocomplete="off"
         <?= $field->hasAttribute('maxlength') ? '' : 'maxlength="255"' ?>
         <?= $field->getAttributes() ?>
     />
-<?php endif ?>
+<?php endif ?>