[BH-1635] Fix for low battery notification on the home screen 2

Now the low battery warning window is visible for 6 seconds.

[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.

[BH-1637] Add low battery screen before using the application

If the battery is discharged below 10%, the user gets a
notification before using the meditation and relaxation application.

[BH-1856] Add setting onboarding year to build year

Added mechanism automatically setting
the default year shown in the onboarding
to the year of build to avoid changing
it manually every year.

[BH-1635] Fix for low battery notification on the home screen

Fix for deep press blocked reaction.

[BH-1857] Fix improper PWM module clock frequency computation

* Fix of the issue that source clock for PWM
module was improperly assumed to be derived
from AHB_CLK, while in reality it is
derived from IPG_CLK, what resulted in
module generating signal with 4 times
lower frequency than the configured
one.
* Cleanups.

[BH-1635] Low battery notification on the home screen

A low battery warning window has been added to the main screen.
This notification will appear only once when the battery level falls to 15%.
It will also appear when the battery level falls below 10% and 5%.

[BH-000] Update Harmony changelog

Update Harmony changelog after MuditaOS
2.4.0 release.

[BH-1846] Reducing power consumption while the application is running

Replacing double with float in rendering a circular progressbar results
in a significant reduction in the demand for computing power, which in
turn translates into reduced power consumption in all applications using
a circular progressbar.

[BH-1731] Replaced outdated translations

Updated existing translations to the
up-to-date ones received from a
translation company.

[MOS-000] Update Harmony 2.3.0 changelog

Update changelog after Harmony 2.3.0
has been released.

[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.

[MOS-000] Update Pure 1.11.0 changelog

Update changelog after Pure 1.11.0
has been released.

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

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

[BH-1836] Increase range of volume adjustment

Update default values

[BH-1807] Increase clock font

Increase clock font in Relaxation, Meditation, Power nap mode

[BH-1843] Add progress bar for volume adjustment windows

A progress bar has been added for all volume control windows.

[BH-1824] Removal of the minus sign in countdown time in Meditation

Removed minus sign in countdown timer in Meditation