[CP-1512] Add crashdumps indexing

Adding indexing to crashdumps to to ensure resistance to the device date
retraction.
When max crashdump count reach the file with higher index number will be
remove.

[MOS-496] Music player broken UI

Fixed issues when selecting track index higher than 31.

[MOS-767] Fix full path displayed for invalid audio file

Fix of the issue that whole file path was
displayed instead of just filename in music
player for invalid audio file for which Taglib
failed to obtain tags.

[MOS-829] Fix the Pure's alarm plays indefinitely

According to the requirements the alarm after.
30 minutes of playing will be stopped
instead of snoozed.

[MOS-814] Fix no sound after BT device connection during call

Fix of the issue that connecting or
disconnecting BT device while call
was in progress resulted in no sound
being heard anywhere due to audio
routing being stopped when HFP device
disconnected.

Additionally minor code cleanup.

[CP-1579] Fix correct password inserted during Pure boot is not accepted

Fix the issue when the USB cable connected to the device during boot up
and Center requested a passcode before the device was fully up.
What caused a 'Wrong passcode' message after typing a passcode
via Center.

[MOS-787] Fix crash when syncing with Mudita-Center

When Pure had large databases - exceeding 2MB, a crash occurred
during synchronization with Mudita-Center.

[MOS-606] Fix inactive alarms after timezone change and reboot

The problem was a race condition.
Fixed by adding additional alarm's event cache update
after assigning the callback.

[MOS-862] Fix for french translation for Ulock Screen

French translation for Ulock Screen communications
and PIN settings phrase

[MOS-838] Unable to unlock SIM card (corner case)

Fixed with adding a missing internal state reset on SIM
connection failure.

[CP-1512] Add information allowing identification to crashdump file

Add the serial number and generation timestamp to crashdump filename.

[MOS-869] Correct typo in file name

Now (correctly): 'TetheringHandler.cpp'

[CP-1575] Fix unwanted Center passcode prompt

Fixed unwanted Mudita Center passcode prompt after long press '#'
while dialing

[MOS-863] Fix phonebook crash when adding country prefix

Fix of the issue that editing existing contact's
number by adding country prefix resulted in
PureOS crash due to application stack overflow.
Additionally moved misplaced changelog entry.

[MOS-495] Fix deleting message content when changing phone mode

Fix of the issue that moving mode slider on new message
window caused the content of the message to be deleted.

[MOS-558] Fix wrong nav. bar state after exit from custom repeat window

The additional navigation bar restore has been added
to have proper state after exit from custom repeat window.
The restoration of the repeat option spinner labels has been added
after uncheck of all options.

[MOS-390] Missing changelog entry

Added changelog entry missing in last PR

[MOS-812] Improved CUSD message handling

* Added handling for shorter +CUSD formats, thus got rid of a crash.
* Added handling for the "push session"+"action required" state of a
  USSD interaction with the network.

[MOS-27] Fix invisible message text after pasting

Fix of the issue that pasting previously copied
text in new message field on thread screen
resulted in text shown in gray and invisibility
of each subsequently entered character.

Further analysis of this issue shown two
additional bugs in this place in code,
as a result a decision to completely
remove 'Reply' prompt text has been
made. Extended description of these
issues can be found in comment under
MOS-27 Jira ticket.

[MOS-390] Fixed emergency number recognition

Emergency contact is now recognized when typed mannualy.