implement view persistence class to prevent junk subscriptions

src/ViewModel/Global/coreViewModel.ts

@@ -100,8 +100,7 @@ export class Context {
         this.keystrokes.set(key, fn);
     };
 
-    constructor(public contextDebugDescription: string) {
-    }
+    constructor(public contextDebugDescription: string) {}
 }
 
 export class ContextHost<T> extends Context {