Drag/Drop of folder shows "Move" action (fixes #33462)

src/vs/workbench/browser/parts/editor/editorGroupsControl.ts

@@ -1257,6 +1257,8 @@ export class EditorGroupsControl extends Themable implements IEditorGroupsContro
 						});
 
 						overlay.on(DOM.EventType.DRAG_OVER, (e: DragEvent) => {
+							e.dataTransfer.dropEffect = 'copy'; // update the dropEffect, otherwise it would look like a "move" operation
+
 							positionOverlay(e, containers.length, index);
 						});
 

src/vs/workbench/browser/parts/editor/tabsTitleControl.ts

@@ -167,6 +167,8 @@ export class TabsTitleControl extends TitleControl {
 
 		// Drag over
 		this.toUnbind.push(DOM.addDisposableListener(this.tabsContainer, DOM.EventType.DRAG_OVER, (e: DragEvent) => {
+			e.dataTransfer.dropEffect = 'copy'; // update the dropEffect, otherwise it would look like a "move" operation
+
 			DOM.addClass(this.tabsContainer, 'scroll'); // enable support to scroll while dragging
 
 			const target = e.target;