[CP-1836] Lack of error handling for audio playback

Added error handling for incorrect audio formats and corrupted files inside Relaxation app

[MOS-874] Complement French translations

Additionally, deleted an unused translation item from
all languages.

[CP-1831] Editing contact which is deleted via Center can still be saved but with incomplete data

Fix for editing contact when it was deleted via Center.
Edited contact cannot be saved if it was deleted earlier. Proper communication is shown.
Fix for phonebook app was not handling database notifications correctly.

[MOS-166] Unify grey color levels

Unified gray color levels used for texts
displayed in GUI.
Fixed issue with 'No calls yet.' text
not displaying.

[MOS-901] Missing translation for words "show" and "replace"

Fix for missing translation for words "show" and "replace" in all
languages except for English.

[MOS-77] Notifications on the home screen shouldn't be bolded

Fix for bolded notification text in every language.

[MOS-663] Replacement for empty templates screen

Now there's information displayed that there are no
templates and in order to add some, the user needs
to use Mudita Center. Also, given no templates, the
screen doesn't show the 'USE' button.

[MOS-893] Fix invalid time description in the SMS thread

The sending/receiving time information will be displayed as follows:
- Only an hour –> for today
- Yesterday and hour –> for messages received/sent yesterday
- Day of the week and hour –> for messages received/sent within
last 7 days
- Date (day+month) and hour –> for messages older than week,
but still from the same year
- Date (day+month+year) and hour –> for messages
rom previous years

[CP-1734] Create factory reset reboot UI

Create window that will be shown when the
device turns off first time after factory
reset request made from PureOS.

[MOS-783] First part of new dir structure implementation

    Works:
    - generating .img for Pure;
    - Pure boots after flashing new image and
    seems to be working fine;

    Not yet:
    - generating update package;
    - generating image for Harmony;
    - simulator;
    - path-related unit tests fail
    due to paths being hardcoded
    in test scenarios.

[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-188] Fix notes window title

Added contextual title for new and edited notes.

[MOS-837] Add contextual text "process in progress" in SIM popup

Depending on whether we select the SIM card for the first time
during onboarding or change to another one in Settings,
the text displayed in the pop-up should be different.

[BH-1622][BH-1623] Add/fix translations in relaxation

Add translations related to once and loop screens.
Fix PL minutes text.

[BH-1599][BH-1573] Fix translations

Make polish translations shorter.
Fix german translation.
Remove nbsp in french translation.

[BH-1599][BH-1573] Shortcuts translations

Add and fix shortcuts translations.
Fix translations in Meditation app settings.

[MOS-821] Adjust VoLTE GUI basing on operator

When VoLTE isn't permitted for the current SIM
card's operator, display information only.
Otherwise, display a switch.

[MOS-800] Add a popup for changing the SIM card

Sometimes the process of changing the SIM card
takes a few seconds and the user needs to be informed
that something is going on in the background.

[BH-1603] Rename BGSounds to Relaxation

Rename all files and classes. Only
filesystem paths have old name due to legacy.

[MOS-641] Fix SIM cards window

Creating menus and actions depending on the SIM card
lock status.