Fix for imported contacts from SIM don't show up in Mudita Center.
Added functionality to send notification after all imported contacts are
added to the database.
Stack plus minimum tests added
Updated to master
Removed useless or adressed TODOS
Constants name applied
Renamed searchModel to searchRequestModel
Review applied
We should remove legacy window names
Bell names fixes
1. Prepare Pure and Bell specific `Application`
classes and add them to `app` target:
- `products/BellHybrid/apps/Application.cpp`
- `products/PurePhone/apps/Application.cpp`
2. Update `CMakeLists.txt` files.
3. Move `ApplicationBell` implementation to Bell-specific
`Application` class and remove `ApplicationBell` files.
4. Change Bell apps parent classes from `ApplicationBell`
to Bell-specific `Application` class.
5. Rename `Application` to `ApplicationCommon` in the rest of the files.