* Added creation of /user/media/app/alarm
directory that will be used to store
custom alarm sounds.
* Implemented new database structure.
* Adapted Alarm, Bedtime, Pre-wake up and
Snooze to new database structure.
* Added removing custom alarm files during
factory reset.
* Added fallback alarm sound mechanism.
* Cleanups, unifications.
- Forward arguments
- Remove unused code
- Remove auto return type when it's not needed
- Add const to member functions
- Use startsWith and endsWith from utils
- Allow instantiation of operators only for specific types
- Caluclate key mask in compile time
*DateSetSpinner and DateSetListItem added (based od TimeSetSpinner and
TimeSetListItem)
*BellSideListItem ctor without title added
*TimeUnitsModel changed to more accurate DateTimeUnitsModel name
