move board search suggestions to CoreViewModel

src/ViewModel/Global/coreViewModel.ts

@@ -1,5 +1,9 @@
 import * as React from "bloatless-react";
 
 export default class CoreViewModel {
+  // drag&drop
   draggedObject: React.State<any> = new React.State<any>(undefined);
+
+  // suggestions
+  boardSearchSuggestions: React.ListState<string> = new React.ListState();
 }