[EGD-5489] Add Bluetooth pairing test

This PR provides a harness test of a current stage `Bluetooth` pairing
functionality. That is provided a `Bluetooth` device name, test logic:
* navigates to a appropriate window
* scans for devices available
* navigates over appropriate device and check's if it is focused

[EGD-5756] Add Update Window

Create Update Window(s) to control and visualize the MuditaOS update
process on Pure.

[EGD-5863] Add retry dialog window

Add generic retry dialog window

[EGD-5737] Merge master into experimental

Synchronize with master before merging

[EGD-5312] Add Time selection window

- add ChangeDateAndTimeWindow,
- extract EventTimeItem to common widgets folder
  and rename it to TimeWidget,
- extract EventDateItem to common widgets folder
  and rename it to DateWidget,
- replace timeWidget with common TimeWidget
  in NightshiftWindow,
- refactor time setting in
  DesktopMainWindow and TopBar,
- Remove dead code from EventManager
  (GetNextAlarmTimestamp and HandleAlarmTrigger)

[EGD-5821] Add Network Access Technology widget

Created Network Access Technology widget.

[EGD-5448] Add EULA window

Added EULA window required for onBoarding procedure.
Onboarding settings added.

[EGD-5805] Fix not charging icon

Fix icons behavior in topbar.
When plugged and no charging
regular dischrging icon is
displayed.

[EGD-5674] Set battery and GSM signal strength indicators as text

Temporary set battery and GSM signal strength indicators as text.
This is for test purposes only

[EGD-5778] Add signal strength dBM inidcator

Refactored signal strength logic and arranged it
as seprated widget.
Added option to display signal strength as dBM or
bar graph.

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge with master

Keep experimental up to date with changes from master

[EGD-5777] Refactored status bar battery indicator

Added an option to display a battery level in percentage

[EGD-5774] Fixed text char removal crash

Fixed text char and blocks removal handling and added
tests covering crashes.

[EGD-3756] Created generic ListItemWithCallbacks

Added generic template for ListItemWithCallbacks.
Replaced onDimensionsChange with callbacks.