So we do need to set the language both on change and onCreate()
For some reason, the title bar of the SettingsActivity is not updated on recreate().
Closes#787
As requested in #736, this adds an entry in the settings menu that allows to blacklist certain calendars.
To avoid confusion, all the former blacklist methods and fields have been renamed to apps_blacklist. The new entries are called calendars_blacklist.
Importing the settings has not been tested with the current changes.
Closes#736
Future improvements TODO: The new setting lives in the Pebble section, i believe in the future the blackslist functionality should be centralized and put in the sidebar.
