MC-4262: Column Rearranging Drop Zone Indicators Are Too Small & Sometimes Hard To Activate

- No need to remove left and right classes from move placeholder

Author: davemacaulay

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

@@ -805,7 +805,7 @@ export default class Preview extends PreviewCollection {
 
                 if (this.movePosition) {
                     this.dropPlaceholder.removeClass("left right");
-                    this.movePlaceholder.removeClass("left right").css({
+                    this.movePlaceholder.css({
                         left: (this.movePosition.placement === "left" ? this.movePosition.left : ""),
                         right: (this.movePosition.placement === "right"
                             ? groupPosition.width - this.movePosition.right : ""),