[EGD-6970] Autolock default value

Set autolock default value to 30 seconds.

[CP-174] Remove limit of maximum attempts of unlocking phone

Limit of 4 attempts of unlocking phone is disabled
due to requirements change. This is a temporary solution until
time intervals between attempts will be intorduced.
Old logic remains untouched on purpose.
It will be reused in final implementation.

[EGD-6950] Added header layout

Added Header Layout.

[EGD-6697] Date and time formatting

Added system locale dependant date and time formatting.

[BH-501] MainMenu

Add Bell main menu window and option menu

[EGD-6797] Remove color from SAR

Colors are not handled properly during scrolling so use only black

[EGD-6918] Timestamp clean up

Removal of not needed methods
Addition of unit tests
Fixes according to newst design guidelines
Added new seprate interface cmake lib for time constants

[EGD-4384] Status bar roaming indicator

Added indicator to let know the user if he is in roaming mode.

Merge branch 'master' into stable

Merge branch 'master' into stable

[CP-140] Deactivate autolock while connected to MC

PurePhone is no longer autolocked, while connected to Mudita Center.

[EGD-6906] Updated OnBoarding update info window

Updated OnBoarding update info window.

[CP-84] Implement Security API

- Added pass code unlock from MC
- Removed Set USB security status
- Changed isLocked to phoneLocked in request for phone lock status
- Removed remainings of USB security in Settings App
- Reworked USB security model to depend both on
    Phone lock state and Pass code being enabled
- Updated test_security.py

[EGD-6867] Renamed TopBar into StatusBar

Renamed TopBar into StatusBar.

Merge branch 'master' into stable

[EGD-6885] Fixed onBoarding done wrong path in settings

Fixed onBoarding done wrong path in settings.

Merge branch 'master' into stable

[EGD-5711] Finalized onBoarding application

Finalized onBoarding application. Added no sim ready window
and sim response window. Created iceBox widget. Fixed various
onBoarding errors and misalignment.

[EGD-6854] Add missing tethering windows

Added missing windows for tethering
based on UI design

[CP-77] Replace receivedAt and sentAt fields with createdAt

sentAt json field was never updated and was not used.
Cleaned up DB and DB interface from unused date_send.