[BH-2069] Update license URL in headers

Update outdated license file URL in
license headers across all project.

[BH-1989][BH-1990] Core functionality of What's New app

Implemented core functionality of What's New
application.

[BH-1992] Fix crash in Meditation and Power Nap

Fix of the issue that Meditation and
Power Nap apps would crash during
active sessions due to bad optional
access introduced in previous time
displaying fix.

[BH-1944] Changing the rounding method for minutes in progress bar

Fix for rounding minutes in Focus Timer application

[BH-1971] Changing the refresh rate of the progress bar screen

The longer the time countdown on the progress bar, the less frequently
the screen is refreshed, which results in less power consumption when
running the Meditation, Relaxation, Power Nap and Focus Timer
applications.

[BH-1944] Changing the rounding method for minutes in relaxation

Only at startup, when the number of seconds is less than 30, the minutes
are rounded down, otherwise they are rounded up

[BH-1943] New countdown timer design in the meditation app

The countdown timer in the Meditation app has been changed
according to the new design. Now the countdown timer only shows the seconds
in the countdown window and only the minutes in the ongoing meditation window.

[BH-1848] Post-rebase fixes

* Fixes for the issues that caused builds
and unit tests to fail.
* Added changelog entry.

[BH-1940] New progress time widget

This widget allows to display minutes and
also seconds when 1 minute left to the end of
the timer.

[BH-1890] Change pre-wakeup chime list to vertical

* Added new widget SongsListViewItem
implementing ListViewWithLabels that
can be added as SettingsListItem.
* Changed horizontal list in pre-wakeup
to vertical using that new widget.

[BH-1895][BH-1909][BH-1910] New database structure for custom sounds

* Added creation of /user/media/app/alarm
directory that will be used to store
custom alarm sounds.
* Implemented new database structure.
* Adapted Alarm, Bedtime, Pre-wake up and
Snooze to new database structure.
* Added removing custom alarm files during
factory reset.
* Added fallback alarm sound mechanism.
* Cleanups, unifications.

[BH-1930] Fix no volume update in DB in Relaxation

Fix of the issue that autoclose of volume
window in Relaxation would result in not
updating current volume value in database.

[BH-1860] Add new clock face with quotes

In the settings, the user can choose a clock face with quotes. A
dedicated clock face includes information about the time, alarm
settings, quote and author of the quote.

[BH-1839] Improved fonts

- Removed unused 190 px font
- Added new 32px bold and light & 170px regular fonts
- Added a new colon for the 170px font

[BH-1874] Fix underline appearing when setting alarm time

Fix of the issue that underline appeared under
hours value when setting alarm time with knob
down (alarm disabled) after previous
confirmation of the alarm time.

[BH-1807] Fix missing AM/PM label in apps clock

* Fix of the issue that after changing font size
of the clock presented in Relaxation, Meditation
and Power Nap apps, AM/PM label was not shown
in 12h mode.
* Added logs informing about missing margins
map entry so that such issue is easier to debug
if it should happen in the future.

[BH-1731] Fix factory reset confirmation window layout

* Fixed factory reset confirmation window
layout to match the corresponding design.
* Added missing translations.

[BH-1845] Fixed time format in Settings and Onboarding (2)

This is the second fix. Now the time format in Settings and Onboarding is currently set
and changes dynamically during the user changing the time parameters.

[BH-1807] Increase clock font

Increase clock font in Relaxation, Meditation, Power nap mode

[BH-1825] Remove minus sign in countdown timers of progress

Removed minus sign shown next to the remaining
time value for timers showing progress in
Meditation, Relaxation and Power Nap apps.
Style constants cleanup.