[BH-384] Turned application desktop to library

Defined separated cmake library, private and public include
directories and dependencies, isolated public headers from private,
cleaned up include paths and defined which targets depend on new
library, cleaned up include paths

[EGD-7130] Renamed settings application

Renamed settings application.

[EGD-7120] Remove old settings application

Moved valuable assets to new settings.
Removed old settings.

[EGD-7044] Strip down calendar code

Stripping the calendar code to provide only
MVP defined functionalities

[BH-386] Turned app messages into lib

Turned application messages into library, defined dependencies,
private and public sources, cleaned include paths, massive
cleaned headers

[EGD-7050] Fixed reboot copy

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

[EGD-6990] No autolock when battery is low

Prevent autolock actions on DeadBatteryWindow and ChargingBatteryWindow

[EGD-6883] Change time settings cleanup

Time related settings are handled by service time now.
utils DateAndTimeSettings replaced by static time service api.

[CP-194] Intercept all input when OS update window is displayed

Block user interaction with phone during OS update,
by intercepting all inputs from phone keyboard when OS
update screen is displayed.

[EGD-6697] Date and time formatting

Added system locale dependant date and time formatting.

[EGD-6960] Header addition related style cleanups

Header addition related style cleanups.

[BH-374] Librarize application-antenna

Add apps-common, librarize application-antenna

Merge branch 'master' into stable

Merge branch 'master' into stable

[EGD-6907] Introduce ModemState in Cellular

We should not use Cellular's internal states to drive
other system parts, especially applications

[BH-378] PR changes

PR changes - mainly includes

[BH-378] Utils move log to library

Moved log to separate library

[EGD-6899] Fix AppCall access

Fix of an access to call window
during tethering

[BH-371] Replace gsl with mainline submodule and move to third-party

Replacing loose gsl files with gsl mainline project as submodule
and moving it to third-party

[EGD-6867] Renamed TopBar into StatusBar

Renamed TopBar into StatusBar.