[BH-739] Split EventManager

Renaming:
- rename EventManager to EventManagerCommon,
- rename PureEventManager and BellEventManager
to EventManager

[BH-739] Split EventManager

Move `test-settings` to `PurePhone` product-specific directory

[BH-739] Split EventManager

Separate Pure and Bell EventManager functionalities
to separate files.

[BH-733] Cleanup target dependencies

Remove obsolete target dependencies across modules.
Remove 'cross' and 'unittests' targets.
Refactor some remaining target dependencies to use board include macro.

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>

[BH-734] Add hardware board selection

To support bell hardware one needs to distinguish between the rt1051
generic target and product's boards.

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>

[CP-330] Remove all remounts RW fat partition

FAT is changed only by the updater application
PureOS shouldn't touch the FAT partition

Signed-off-by: Lucjan Bryndza <lucjan.bryndza@mudita.com>

[BH-701] Use TimeSetFmtSpinner in Alarm app

Fix default font issue

[BH-701] Use TimeSetFmtSpinner in Alarm app

Use TimeSetFmtSpinner in Alarm app

[BH-736] Add image generation

Add image generation

[BH-687] Add Events to DB

Add Events table to sql database
Add EventsTable and EventsRecord

[EGD-7217] Separate commonly used headers from application-calendar

Move dateCommon.hpp to module-utils/time

[BH-742] Handle different products in run script

Handle different products in run script

[CP-46] Extend contact info endpoint

Include email, speed dial, ice and notes.

[BH-721] RRule wrapper

Wrapper to icallib recurence rules

[EGD-7314] Fix branch out-of-date checks

Due to introducing release branch, the check was working faulty
Now it's fixed

[BH-699] Silence libical warnings

Silence libical warnings

[BH-723] Added ThreeBox and BellBaseLayout

Added ThreeBox template layout type. Applied it to Pure header.
Created BellBaseLayout for most of Bell windows. Modified
SideListView to proper handle new layout with page bar on/off.

[BH-708] Time and units 

Added missing views/windows.
From now home screen properly displays current time.

[BH-395] Librarize application-settings

Librarize application-settings

[BH-690] Add interface for alarm and alarm repo

Definition of basic alarm structures and interfaces