src/vs/workbench/browser/parts/views/treeView.ts/CustomTreeViewDragAndDrop/onDragEnd
class CustomTreeViewDragAndDrop:	onDragEnd(originalEvent: DragEvent): void {
		// Check if the drag was cancelled.
		if (originalEvent.dataTransfer?.dropEffect === 'none') {
			this.dragCancellationToken?.cancel();
		}
	}