refs https://github.com/TryGhost/Team/issues/3009
- It's best to pull in as much data from the API as the app's state will ever use. Makes it explicit about what fields the app depends on instead of requesting a whole of "settings"
refs https://github.com/TryGhost/Team/issues/3009
- The change hooks up the announcement bar script to use "announcement" and "announcement_background" values coming from the Content Settings API