The bug could be noticed on the PowerNap's
progress window. The countdown there is supposed
to be increasing in value, that means the minus
sign should be visible at all non-zero values.
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.
The following commit provides implementation of ProgressTimer.
The timer purpose is to provide suitable abstraction of a timer
that can be visually represented by both Text and Progress.
The implementation is based on MeditationTimer and thus
the ApplicationMeditation's part that uses MeditationTimer
has been refactored.
