PB-1199 - fix bug PB-1199

Author: paras89

app/code/Magento/PageBuilder/view/adminhtml/web/js/content-type/column/preview.js

@@ -8,7 +8,7 @@
 <div class="pagebuilder-column-group pagebuilder-content-type-affordance pagebuilder-content-type pagebuilder-affordance-column-group"
      ko-style="Object.assign(data.container.style, getStyle(data.main, ['marginTop', 'marginBottom', 'marginLeft', 'marginRight', 'width', 'alignSelf', 'minHeight']))"
      event="{ mouseover: onMouseOver, mouseout: onMouseOut }, mouseoverBubble: false"
-     css="Object.assign(data.main.css(), {'empty-container': $parent.children().length == 0})"
+     css="Object.assign(data.main.css(), {'resizing': resizing, 'empty-child': hasEmptyChild, 'grid-change': gridChange, 'empty-container': $parent.children().length == 0})"
      attr="data.main.attributes">
 
     <render args="getOptions().template"></render>

app/code/Magento/PageBuilder/view/adminhtml/web/template/content-type/column-group/default/preview.html

@@ -26,6 +26,7 @@ import {
 import ObservableUpdater from "../observable-updater";
 import PreviewCollection from "../preview-collection";
 import {updateColumnWidth} from "./resize";
+import {InitElementEventParamsInterface} from "./column-events.types";
 
 /**
  * @api
@@ -92,6 +93,9 @@ export default class Preview extends PreviewCollection {
             this.resetRemoveOnLastColumn(args.targetParent);
             this.resetRemoveOnLastColumn(args.sourceParent);
         });
+        events.on("column:initializeAfter", (args: InitElementEventParamsInterface) => {
+            this.resetRemoveOnLastColumn(args.columnGroup);
+        });
         events.on("column:dropAfter", (args: ContentTypeDroppedCreateEventParamsInterface) => {
             this.resetRemoveOnLastColumn(this.contentType.parentContentType);
         });