implement drag&drop for kanban

src/ViewModel/Global/coreViewModel.ts

@@ -1,7 +1,5 @@
 import * as React from "bloatless-react";
 
 export default class CoreViewModel {
-  draggedFile: React.State<File | undefined> = new React.State<
-    File | undefined
-  >(undefined);
+  draggedObject: React.State<any> = new React.State<any>(undefined);
 }