[EGD-5968] Fix PowerOff window

PowerOff window lifting done
to comply with given design.

[EGD-5969] Add battery charging UI

Battery charging UI modified
according to design

[EGD-5832] Status bar widgets refactor

Status bar SIM widget refactor
Status bar time widget recfactor
Status bar lock widget refactor
Separation of status bar time widget and desktop main window time widget
Fixed issue with wrong calculation of timezone based time

[EGD-5758] Restore auto locking timer in ApplicationManager

Restore auto-locking functionality

[EGD-5771] Create post update info window

Add post update info 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-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-5158] Change access to the bus methods

The bus is now accessible only via Service object.

[EGD-5517] Add MMI custom response window

Add MMI custom response windows for:
Call barring
Call waiting
CLIP
CLIR
IMEI

[EGD-2514] Fix clock does not refresh

There was no refresh trigger that would cause items like clock
to display its up-to-date state while user is being inactive.
This PR solves that issue providing timer-based refresh trigger
that is dependent on user activity.

Merge branch 'master' into stable

[EGD-4801] Add application-wide top bar manager

Applications configure the top bar once for all their windows.
Sometimes, windows need to configure top bars with its configuration.

[EGD-5250] Change time format on home screen and status bar

This commit changes time format displayed on home screen 
and on status bar by adding new locale for 12H format, 
which excludes am/pm suffix.
The new locale is set as new default format for time string.

Minor: Grammar typo fixed.

Merge commit 'c7dd6b399' into stable

[EGD-2501] Add gsm powerdown due to battery

Gsm model power state maintenance based on battery level.

[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.