Due to enabled EHCILL the shutdown procedure takes longer time
than before, so restarting by turning off and on without a delay
caused crash in the BT stack. Added delay between shutdown and
power on to let the stack turn off completely
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.
Display and keypad setting cleanup. Moved settings window
Names to separate file. Added selective build options.
Fixed SpinBox arrows position. Fixed focus on window start
in InputLanguageWindow and KeypadLightWindow. Moved AutoLock
to Security. Disabled not working options in UI.
