[BH-1705] Fixed back button power off timer to 10s

When holding the back button, the device would prompt to
power off after 5s. This was not inline with the manual. Now
the prompt will come up after 10s which is correct by the
manual. In the code, the actual time is set to 9s because
an additional 1s delay is caused by the OS and screen
refresh rate.

[CP-1962] Add Harmony color detection

* Added serial number based Harmony color
detection.
* Unified serial number handling for both
products.

[BH-1647] Add serial number to about section

Added serial number entry to about window

[CP-889] Add extended information about number duplications

Changed a way of returning information to Center about number
duplications

[BH-1690] Add information about the connection to the PC

Minor fixes to label positioning and connection detection

[BH-1691] Fix battery and date layout

Fixed battery and date layout for Harmony

[BH-1673] Harmony random resets fixes

* Switching VDD_SOC_IN only after PLL2 is turned off.
* Weak LDO stabilization delay.
* Removed switching to 1.275V before frequency change.
* Cleanups in LDO switching.
* Removed switching PeriphClk2Div for fCPU <= 24MHz,
using AhbDiv instead.
* Removed log from _exit that caused logger mutex deadlock

[BH-1690] Add information about the connection to the PC

Added text with information about the connection to the main window
when the USB cable is connected to the PC

[MOS-686] Fixed MTP availability only after phone unlocked

Fixed file access via MTP even when phone is not unlocked.
Now access is granted when the phone is unlocked by the user entering
a passcode. If the phone is not passcode protected (passcode is nor set)
then access to the files is always possible via MTP.

[CP-1966] Deleted file which is played does not stop the playback timer

Fixed the timer issue when file was deleted during playback.

[BH-1691] Change the layout of the battery status

The new layout of battery status has the battery
SOC on the left side and battery image on the right.

[BH-1693] Correct SDRAM timing settings according to chip RM

* Corrected SDRAM timings in T6 JLink script.
* Cleaned-up and commented JLink script.
* Bumped bootloader version.

[BH-1661] E-ink display power management tweaks

Tweaks and changes required to optimize
power consumption for Harmony.

[CP-1939] Difference in displaying file name for list and for loop play function

Fixed problem with displaying end of title when playing song in loop was
selected.

[CP-1852] Too many user files removes default relaxation audio from the list

Changed order in which files in Relaxation are displayed
Added error message when files limit is exceeded

[MOS-636] Added MMI/USSD confirmation

USSD/MMI codes are now confirmed after they are sended.

[MOS-000] Fixed minor issue in db migration script

* Removed doubled copyright header from 'up/down/devel.sql' when committing
databases.
* During installing, 'devel.sql' was created even if specific revisions
didn't contain one.
* Removed unnecessary product-specific .lua scripts.

[CP-1837] Random crashes while copying files

Use ConstMemoryConstrainedFileRef newly added to taglib

[CP-1825][BH-1660] Update while on onboarding screen

Commit DB changes

[CP-1797] Low battery connection with mc is possible

Decrease critical battery level from 10% to 5%
Add a new entry to the security endpoint in order to block MC
when the phone battery level is critical