[EGD-6209] Tethering confirmation popup added

Provided a tethering confirmation popup.
The popup shows up once a USB cable is connected to a PC.

[EGD-5743] Added phone modes popup

Implementation of phone modes window.
Minor fixes of previous approach.

[EGD-5945] Bluetooth-harness API messages

This PR:
* provides Bluetooth-Harness API messages definition [EGD-5944]
* provides Bluetooth-Harness API messages implementation
* provides Bluetooth-Harness API usage on harness side [EGD-5946]
* provides Bluetooth-Harness tests [EGD-5947]

[EGD-6010] Fix addres in retry window

Address was lost while being forwarded to the retry window.

[EGD-5883] Added generic button popups attach to applications

Created structure and implementation for popup windows
attachments on button actions into applications. Moved Volume
window to fit into solution. BarGraph refactored.

[EGD-4157] Actions queue added

All actions shall be queued in order to process them later.

[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-5158] Change access to the bus methods

The bus is now accessible only via Service object.

[EGD-4822] Add color test window to settings app

Add new window to allow convenient display and globally
change used color intensities  for design and testing purposes.
Changes were introduced to Renderer as well as GUI service
to allow global change of used color scheme.
When using list, screen is deep refreshed each
time the color is changed.
Known issues:
Item focus borders (top,bottom) with changed black intensity
may not render properly, however it doesn't obscure the
target functionality.

[EGD-5311] Create Date&Time main window

- add DateAndTimeSettings class and
  dateAndTimeSettings global var
  (cache for storing date and time related settings),
- add DateAndTimeChangeRequest messages and proper
  methods in app::manager::Controller for sending them,
- handle DateAndTimeChangeRequest messages in ApplicationManager,
- add SettingRightItem::Text case for OptionSettings
  to provide possibility to add text
  on the right side of particular option,
- rename fields in db (settings_tab table):
  gs_time_format_12 to gs_time_format
  and
  gs_time_date_format to gs_date_format
- create only main Date&Time window.
  Sub windows will be added in separate task.

Merge branch 'master' into stable

[EGD-4960] registerVariableChange moved to Init section of apps

[EGD-4960] Settings Interface added parameter do distinguish global/app settings
[EGD-4960] global/local setting determined by enum value, unregister all variables in one call, ut updated
[EGD-4960] SettingsScope usage in SettingsMessages

Merge branch 'master' into stable

[EGD-5087] Update Options and replace PageLayout with ListView

PageLayout removed and replaced with ListView.
Options structure and namespace cleanup.
Added ListView ScrollBar type and disable on
construction.

[EGD-4925] Change new filesystem handling implementation in module-gui. (#1193)

Due to vfs deprecation there is need to remove all vfs calls from code. This PR covers module gui. There are some modifications in other modules included which are necessary because of build system issues.

[EGD-4914] input and display languages connection to settings problem… (#1188)

* [EGD-4914] input and display languages connection to settings problem solved

[EGD-3995] setup sim window prepared basing on the old settings (#913)

[EGD-3995] updated to new settings
[EGD-3995] sim switch using CellularServiceApi