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.
- add missing call super.setUp() in LoggingTest
- make use ofGBApplication's logger and db support instead
of adding specific test things. Avoids differences between
the local test things and the global GBApplication instances.
We now have a per device database that tracks sync states for calendar entries
We still cannot track changed calendar entries that where changed while we were disconnected
