[BH-2019] Fix alarm sounds list after selected file deletion

Fix of the issue that removing custom
alarm file while the alarm was ringing
would result in "Unsupported media file"
popup being shown for any file on
alarm sound selection list.

[BH-2005] Add volume setting for focus timer

The user will be able to control the volume of notifications in the
Focus Timer application

[BH-2000] Change order of entries in Settings

Changed order of entries in Settings menu, so
that they're grouped in logical categories.

[BH-1946] Add update instructions in settings

User will see instructions on how to update Harmony operating system at
any time in settings.

[BH-1945] Add update instructions at the end of onboarding

User will see instructions on updating Harmony's OS at the end of
onboarding.

[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-1955] Fix incorrect Polish conjugation in Focus Timer

Fixed incorrect conjugation of word
"minuta" on Focus Timer summary
screen.

[BH-1954] Fix incorrect English form in Focus Timer

Fixed incorrect English form of
"minute" word in copy shown on
focus session summary screen.

[BH-1942][BH-1944] New countdown timer in the Power Nap and the Relaxation app

The countdown timer in  in the Power Nap and the Relaxation app has been changed
according to the new design. Now the countdown timer only shows the minutes.

[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-1941] Add translations for Focus timer app

Added a translations for new texts in Focus timer application.

[BH-1901] Add long breaks to focus timer application

The user can set the duration and frequency of the long break in the
settings.

[BH-1899] Add low battery screen before starting focus session

If the battery is discharged below 10%, the user gets a
notification before starting the focus session.

[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-1900] Add focus time, repeats and short break time to settings

The user will be able to set the time and number of repetitions for the
focus session and the time of a short break in the Focus Timer
application

[BH-1922] Add a Summary screen to Focuse timer

Added a summary screen that tells the user how much time they spent in focus.
This screen is displayed after the last focus time.

[BH-1899] Focus timer basic

Added a basic version of the Focuse timer function.
This basic version allows the user to run the focus timer with
only the default parameters. Focus time is set at 25 minutes,
short break at 5 minutes for 10 focus intervals.

[BH-1905] Add Focus timer application to the menu list

Creating a new application "Focus Timer" and adding it to the main menu
list