feat(preferences): extension modals into extension panes (#683)

* feat(preferences): show inline extensions in extensions pane

* wip

* wip

* refactor: convert ComponentView to React component

* refactor: convert ComponentView to React component

* chore: fix merge conflicts

* feat: don't show features whose `area` is "room", update modal items' icons in Preferences menu

* chore: fix TS error

* feat: don't show 2FA Manager in modal-based component

* feat: remove `ExtendedDataReloadComplete` event, since Extensions Manger is being removed from the app

* chore: avoid hardcoded values in svg image, optimize `if` condition

* chore: remove remnant comment

* fix: fix typescript errors

Co-authored-by: vardanhakobyan <vardan_live@live.com>

app/assets/javascripts/ui_models/app_state/app_state.ts

@@ -34,7 +34,7 @@ export enum AppStateEvent {
   BeganBackupDownload,
   EndedBackupDownload,
   WindowDidFocus,
-  WindowDidBlur,
+  WindowDidBlur
 }
 
 export type PanelResizedData = {

app/assets/javascripts/ui_models/app_state/preferences_state.ts

@@ -29,7 +29,7 @@ export class PreferencesState {
     this.currentPane = 'account';
   };
 
-  get isOpen() {
+  get isOpen(): boolean {
     return this._open;
   }
 }