- Add highlighting of blocks that are being edited;

- Refactor block settings views;
- Change Posts widget to display 8 posts in settings;
- Move ALC/Posts category selector label to Select2 placeholder.

assets/js/src/newsletter_editor/blocks/container.js

@@ -125,6 +125,7 @@ define([
           return view.renderOptions.depth === 1;
         },
       },
+      HighlightEditingBehavior: {}
     },
     onDragSubstituteBy: function() {
       // For two and three column layouts display their respective widgets,
@@ -309,9 +310,6 @@ define([
         "click .mailpoet_done_editing": "close",
       };
     },
-    behaviors: {
-      ColorPickerBehavior: {},
-    },
     regions: {
       columnsSettingsRegion: '.mailpoet_container_columns_settings',
     },