[BH-2004] Update sign server IP address

Updated sign server IP address after
recent Jenkins migration to new machine.

[BH-2001] Fix debug build with new FSL

* Fixed some issues that have been
caught by asserts in debug build.
* Minor cleanup.

[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-1776] Grinn USB fixes

Fixes and improvements implemented by external
company Grinn, expanding the set of supported
chargers.

[MOS-1068] Fix A2DP stream not restarting after song changes

Workaround for the issue that A2DP stream
would sometimes not restart when music
player changes song to the next one.

[MOS-1068] Cleanup BTStack intergration

Code cleanup in various places of
BTStack integration.

[MOS-1069] Change A2DP stream volume scale to exponential

Fix of the issue that A2DP stream volume
was controlled using naive approach
with linear scaling instead of
exponential one, what resulted in
highly non-linear volume control
experience.

[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-000] Update Harmony 2.7.0 changelog

Update changelog after Harmony 2.7.0
release.

[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-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-1952] Bump Ecoboot version

Bump Ecoboot version for Harmony
to 2.0.11.

[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.