[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.

[MOS-791] Introduce tri-state switch widget

Introduced the new logic.

From now on, every button can be tri-state, that is,
OFF/ON/Transiting whereas the Transiting state is
marked with the 'cheking...' caption written on the
button.

[MOS-26] Add tethering info on status bar

When tethering is on, info appears in the status bar
and network coverage indicates "no connection"

[MOS-666] Fix disappearing setting bars in German

Fix of the issue that with German language
selected manual volume setting bar and
vibration volume setting bar would
disappear when focused.

[MOS-709] Added Polish translation to calendar

Added Polish translation to
a calendar title.

[BH-1550] Medstats translations

Updated meditation statistics translations.

[MOS-647][MOS-671] BT volume control fixes

Set of fixes for Bluetooth volume control issues:

* split OS volume from A2DP device volume;
* added translations for additional popup required
to indicate what volume is being set;
* fixed issue that on some devices setting the lowest
volume level would set the highest in reality;
* fixed Bluetooth auto-turnoff functionality;
* minor code cleanup.

[BH-1540] Meditation translations

Meditation translations

[MOS-548] Missing polish texts

Added translations for:
- empty calllog list,
- custom alarm clock settings.
Fixed text on wrong-passcode screen lock.

[BH-1478] Translations update

Updated Polish and French translations.

[MOS-363] Call app texts not fully shown fix

Fixes for the cut texts in call app problem.
Problematic texts have been shortened
and additionally icons have been slightly
widened.

[BH-1478] Add missing translations

Added missing translations for
meditation application.

[MOS-477] Add the call log erasing option

Fix the Polish text alignment