chore: show invite count bubble on preferences button (#2458)

packages/services/src/Domain/Status/StatusServiceInterface.ts

@@ -1,14 +1,20 @@
+import { PreferencePaneId } from '../Preferences/PreferenceId'
 import { AbstractService } from '../Service/AbstractService'
 
 /* istanbul ignore file */
 
 export enum StatusServiceEvent {
   MessageChanged = 'MessageChanged',
+  PreferencesBubbleCountChanged = 'PreferencesBubbleCountChanged',
 }
 
 export type StatusMessageIdentifier = string
 
 export interface StatusServiceInterface extends AbstractService<StatusServiceEvent, string> {
+  getPreferencesBubbleCount(preferencePaneId: PreferencePaneId): number
+  setPreferencesBubbleCount(preferencePaneId: PreferencePaneId, count: number): void
+  get totalPreferencesBubbleCount(): number
+
   get message(): string
   setMessage(message: string | undefined): void
   addMessage(message: string): StatusMessageIdentifier