chore: app group optimizations (#1027)

app/assets/javascripts/UIModels/AppState/AbstractState.ts

@@ -0,0 +1,23 @@
+import { DeinitSource } from '@standardnotes/snjs'
+import { WebApplication } from '../Application'
+
+export function isStateDealloced(state: AbstractState): boolean {
+  return state.dealloced == undefined || state.dealloced === true
+}
+
+export abstract class AbstractState {
+  application: WebApplication
+  appState?: AbstractState
+  dealloced = false
+
+  constructor(application: WebApplication, appState?: AbstractState) {
+    this.application = application
+    this.appState = appState
+  }
+
+  deinit(_source: DeinitSource): void {
+    this.dealloced = true
+    ;(this.application as unknown) = undefined
+    ;(this.appState as unknown) = undefined
+  }
+}