src/vs/workbench/contrib/files/browser/views/openEditorsView.ts/OpenEditorsDragAndDrop/onDragOver
class OpenEditorsDragAndDrop:	onDragOver(data: IDragAndDropData, _targetElement: OpenEditor | IEditorGroup, _targetIndex: number, originalEvent: DragEvent): boolean | IListDragOverReaction {
		if (data instanceof NativeDragAndDropData) {
			if (isWeb) {
				return false; // dropping files into editor is unsupported on web
			}

			return containsDragType(originalEvent, DataTransfers.FILES, CodeDataTransfers.FILES);
		}

		return true;
	}