refactor: rename states to view controllers (#1060)

app/assets/javascripts/Controllers/ActionsMenuController.ts

@@ -0,0 +1,22 @@
+import { UuidString } from '@standardnotes/snjs'
+import { action, makeObservable, observable } from 'mobx'
+
+export class ActionsMenuController {
+  hiddenSections: Record<UuidString, boolean> = {}
+
+  constructor() {
+    makeObservable(this, {
+      hiddenSections: observable,
+      toggleSectionVisibility: action,
+      reset: action,
+    })
+  }
+
+  toggleSectionVisibility = (uuid: UuidString): void => {
+    this.hiddenSections[uuid] = !this.hiddenSections[uuid]
+  }
+
+  reset = (): void => {
+    this.hiddenSections = {}
+  }
+}