PB-108 static test fixes

Author: paras89

app/code/Magento/PageBuilder/view/adminhtml/web/css/source/content-type/column-line/_default.less

@@ -8,18 +8,19 @@
 //  _____________________________________________
 
 .pagebuilder-column-line {
-    width:100%;
-    position:relative;
+    position: relative;
+    width: 100%;
 
-    .bottom-drop-placeholder, .column-drop-placeholder {
+    .bottom-drop-placeholder,
+    .column-drop-placeholder {
         background: rgba(142, 0, 6, 0.3);
-        height:30px;
-        display:none;
-        z-index:26;
+        display: none;
+        height: 30px;
+        z-index: 26;
     }
 
     .element-children {
-        display:flex;
-        width:100%
+        display: flex;
+        width: 100%;
     }
 }

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

@@ -336,7 +336,8 @@ export default class Preview extends PreviewCollection {
     private onExistingColumnDrop(movePosition: DropPosition) {
         const column = getDragColumn();
         const sourceLinePreview = column.parentContentType.preview as ColumnLinePreview;
-        let modifyOldNeighbour;
+        let modifyOldNeighbour: ContentTypeCollectionInterface<ColumnPreview>;
+
 
         // Determine which old neighbour we should modify
         const oldWidth = sourceLinePreview.getResizeUtils().getColumnWidth(column);