message: fix(content): get the first config before listening
diff: import { appConfigFactory, AppConfig } from '@/app-config'
  -import { addAppConfigListener } from '@/_helpers/config-manager'
  +import { createAppConfigStream } from '@/_helpers/config-manager'
  /*-----------------------------------------------*\
  Actions
  @@ -31,7 +31,7 @@ export default function reducer (state = appConfigFactory(), action): ConfigStat
  type Action = { type: Actions, payload?: any }
  /** When app config is updated */
  -export function newConfig (config): Action {
  +export function newConfig (config: AppConfig): Action {
  return { type: Actions.NEW_CONFIG, payload: config }
  }
  @@ -45,6 +45,6 @@ type Dispatcher = (
  export function listenConfig (): Dispatcher {
  return dispatch => {
  - addAppConfigListener(({ config }) => dispatch(newConfig(config)))
  + createAppConfigStream().subscribe(config => dispatch(newConfig(config)))
  }
  }
  