message: fix(background): regression. mistakenly added new code
diff: @@ -10,8 +10,6 @@ import { getAppConfig } from '@/_helpers/config-manager'
  // import { mergeMap, filter, map, audit, mapTo, share, startWith } from 'rxjs/operators'
  import { Observable } from 'rxjs/Observable'
  import { ReplaySubject } from 'rxjs/ReplaySubject'
  -import { fromPromise } from 'rxjs/observable/fromPromise'
  -import { merge } from 'rxjs/observable/merge'
  import { combineLatest } from 'rxjs/observable/combineLatest'
  import { mergeMap } from 'rxjs/operators/mergeMap'
  import { filter } from 'rxjs/operators/filter'
  @@ -81,12 +79,7 @@ browser.contextMenus.onClicked.addListener(info => {
  export function init (initConfig: ContextMenusConfig): Observable<void> {
  if (setMenus$$) { return setMenus$$ }
  // when context menus config changes
  - const contextMenusChanged$ = merge(
  - fromPromise(getAppConfig().then<StorageUpdate<AppConfig>>(
  - config => ({ newValue: config })
  - )),
  - storage.createStream<AppConfig>('config'),
  - ).pipe(
  + const contextMenusChanged$ = storage.createStream<AppConfig>('config').pipe(
  filter((config): config is StorageUpdate<AppConfig> => {
  const { newValue, oldValue } = config
  if (!newValue) { return false }
  