* store appConfig in app store on application initialization
so it is easily accessible
* move getEnabledLanguages from services/utils into i18n selectors
* do not duplicate messages in the state - the source is
components/i18n/messages.js
* convert i18n components to receive current language and available
languages from store using selectors
Change-Id: Id6fd0da41bb75caca721ea6082603501670c36b8