[EGD-7044] Strip down calendar code

Stripping the calendar code to provide only
MVP defined functionalities

[EGD-7050] Fixed reboot copy

Fixed the copy that prompts the user to confirm
 the reboot of the phone.

[EGD-6041] Fix unlock windows behaviour

Fixed behaviour so the window acts as in Miro requirements and has 2
seconds timeout.

[BH-495] Created Bell Hybrid home screen

Cleaned up PurePhone remainings, modified UI to comply with
documentation, cleaned up include paths to comply Mudita guide

[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-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-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

Merge branch 'master' into stable

Merge branch 'master' into stable

[EGD-6906] Updated OnBoarding update info window

Updated OnBoarding update info window.

[EGD-6867] Renamed TopBar into StatusBar

Renamed TopBar into StatusBar.

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

[EGD-5885] Added SimLockHandler

Refactored LockWindow TitleBar handling. Added Sim pin request
block on lockedPhone. Added Sim info popup added when pin
changed. Updated assets. Removed old PinLock structures.
Cleared LockBox structures. Removed old settings sim setters.
New CellularMessage adaptation. Cleared Lock structure.

[EGD-5404] Added onBoarding Sim select window

Added onBoarding Sim select window and skip sim select.
Removed old PhoneLock settings selector from settings.

[EGD-6740] Availability and Change handled by PhoneLockHandler

Availability and Change in phoneLock handled by
PhoneLockHandler. Removed old implementation from
onBoarding and Settings. Cleared language assets.

[EGD-6520] Show factory data on technical information window

Remove mocked data and read real data from settings db

[EGD-6453] Warning when adding incorrect event

When adding to Calendar an event which is incorrect  (e.g. has empty
title or end which is sooner than start) warning window appears.