[BH-1897] Add tick icon to currently selected sound

* Added mechanics showing tick icon
next to currently selected sound
in Bedtime and Pre-wakeup.
* Removed no longer used LabelOption
widget.

[MOS-1064] Fix no input language selected for French/Spanish

Fix of the issue that choosing French
or Spanish as a system language
resulted in no input language selected.
Effectively reverts
8f8b9d86b3caf12b18dadf89dd5c36e7090486f3.

Revert "[MOS-1064] Fix no input language selected for French/Spanish"

This reverts commit 9ef454085e4cca8a1f6c3c270cf460f899c9ee23.

[MOS-1064] Fix no input language selected for French/Spanish

* Fix of the issue that choosing French
or Spanish as a system language
resulted in no input language selected.
* Added keyboard input parser unit
tests for French and Spanish input
maps.
* Minor cleanups.

[BH-1657][BH-1833][BH-1854] Add WFI and SDRAM self-refresh mode

* Added mechanism enabling CPU to
enter WFI mode when the OS is
in idle, what results in large
power consumption reduction.
* Added mechanism to switch SDRAM to
self-refresh mode before entering
WFI, what resulted in further power
consumption reduction.

[MOS-1052] Change VoLTE label from 'beta' to 'experimental'

Changed VoLTE label from 'beta' to
'experimental'.
Fixed transition state label font
size to match the design.

[MOS-498] Change input language with the change of the system language

Now when the user changes the system language, the input/keyboard language
will change automatically (in the background).
If the user changes the input/keyboard language, this will not change
the system language.

[BH-1688] Create a standard for logs

* Adding document describing how to use logger
* Adjusting logs to follow a new guide
* Change order in log header:
  line number is now before function name

[MOS-1033] Add 'beta' label to VoLTE switch for selected countries

Added mechanism enabling to individually show
or hide "beta" label on VoLTE switch for each
country.

[MOS-1011] Fix frequency switching stability

Multiple fixes of clock switching related
stability issues:
* added RC oscillator hysteresis as in NXP example;
* changed DCDC converter config;
* configure PLL2 to be able to run on any CPU
frequency level;
* added switching to 1.275V (overdrive) voltage
when applying any clock change above 12MHz as
well as LDO or bandgap switching, as done in
Mbed OS' lpm.c for RT1050;
* changed BMCR AXI queues weighs for SDRAM
in JLink scripts to disable operations
reordering, as it is known to cause data
integrity issues;
* extracted some code to separate files;
* smaller or bigger code cleanups.

[MOS-1032] Fix misleading 'Save' button behavior when setting time

Fix of the issue that pressing 'Save' when setting
time would set the time indeed, but the UI would
not return to previous window, what might look
as if saving failed.

[MOS-170] Report domestic roaming as home network

Changed behaviour of roaming indicator so that
domestic roaming is displayed as home network.

[BH-1412] Fix services dependencies

Changes in dependecy managment
Replacing state flags with states in ServiceGUI
Unifying some parts of code

[MOS-1005] Fix handsfree ringing after caller hangs up

* Fix of the issue that incoming call triggered
handsfree ringing which didn't stop after
calling side hung up.
* Cleanup of several places in code, minor
bluetooth <-> cellular integration refactor.

[MOS-178] Add input mode displaying timeout

Added timeout for displaying selected input
mode - now it automatically disappears
after 3 seconds since last change was made.

[MOS-906] Fix missing tick mark in ringtones list

Fix of the missing tick mark that should appear
on the currently selected ringtone, but didn't.

[MOS-28] Change alarm sounds and ringtones preview behavior

Change of the behavior of alarm sounds
and ringtones preview, so that it matches
with the design.

Additionally fixed lack of ringtones list
looping.

[CP-1210] Contacts imported from SIM dont show up in Mudita Center

Fix for imported contacts from SIM don't show up in Mudita Center.
Added functionality to send notification after all imported contacts are
added to the database.

[CP-1734] Create factory reset reboot UI

Create window that will be shown when the
device turns off first time after factory
reset request made from PureOS.

[MOS-783] Fix crash on entering SAR menu

Fix of the issue that entering SAR option
in menu resulted in crash of the phone
due to uncaught exception caused by
invalid path provided.