[MOS-578] Fix misleading SMS notification text

Display "New message", translated accordingly - in
singular - in case there had been multiple unread
SMS messages and now only one remains unread.

[CP-1974] Deleting all templates leaves some text on pure screen

Fixed Template window clearing after all templates are removed.

[CP-1937] Amount of space assigned to "Other" changes after uploading audio file

Fixed by sending information about device memory in floats instead of
uints

[BH-1595] USB charger detection issues

* Fixed issues with USB charging port detection
* Fixed memory leak in usb_stack/OS integration layer
* Fixed incorrect handling of software timer
* Minor cleaning/refactor.

[BH-1595] Turned off USB/PC charging

Charging enabled only for a dedicated charger. Users won't be able
to charger while connected to the PC.

[CP-1950] Templates menu navigation loop and pagination on pure gets blocked

Fixed problem where the Templates window gets unresponsive for user input
while changes in templates were done via MC

[MOS-980] Match volume popup timeout with phone modes popup

As title describes.

[CP-1841] Distorted playback and poor device control responsiveness

Fixed problem with an unresponding device after playing specific WAV files.
WAV files encoded with ADPCM are not supported now by the devices.

[MOS-982] Recognizing WCDMA network access method for 3G in GUI

Ditto

[MOS-933] Added translations for Bluetooth connection status

Ditto

[MOS-981] Fix crash on phone turn off

Fix of the issue that the phone
might sometimes crash on shutdown.

[MOS-977] Added VoLTE support in additional countries

Added VoLTE support in Poland, Germany, Denmark, United Kingdom,
 Netherlands, Canada and Austria.

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

Tweaks and changes required to optimize
power consumption for Harmony.

[MOS-636] Added MMI/USSD confirmation

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

[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

[MOS-946] USSD contacts

Fixed adding USSD codes to phonebook.

[MOS-969] Unify GUI action after contact adding

Fix of the issue that after adding new contact
window with contact details was shown, whereas
after adding new contact with the same number
as the one already present in another contact,
list of all contacts was shown.
Minor cleanup.

[MOS-942] Fix access to contacts when onboarding in progress

During onboarding, the user could add new contacts
by entering the emergency call screen.

[MOS-000] Update changelog

Updated changelog for 1.7.0 version

[MOS-178] Add input mode displaying timeout

Added timeout for displaying selected input
mode - now it automatically disappears
after 3 seconds since last change was made.

[MOS-924] Fix redundant logs about CSQ reporting mode

When the modem was turned off (e.g. due to a discharged battery),
CSQ reporting mode logs caused logger buffer overflow.