[EGD-5204] Secure USB communication

Secure all endpoints by returning 403(Forbidden) when USB is connected.
Request screen passcode to enable secured endpoints.

[EGD-5863] Add retry dialog window

Add generic retry dialog window

[EGD-5737] Merge master into experimental

Synchronize with master before merging

[EGD-5545] Add PIN2 handling

Possibility of handling PIN2 request from modem.
Description of the message in PinLock what type of
code is required

[EGD-5448] Add EULA window

Added EULA window required for onBoarding procedure.
Onboarding settings added.

[EGD-5810] Fix for old batteries

Temporary fix for old batteries

[EGD-5800] Fix small BT icon

Replace small BT icon with the corrent one

[EGD-2631] Create window for entering connection code

Create only window.
Business logic will be added later.

[EGD-5778] Add signal strength dBM inidcator

Refactored signal strength logic and arranged it
as seprated widget.
Added option to display signal strength as dBM or
bar graph.

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5014] Add eMMC block device API

Add PureOS wrapper for eMMC driver with support
for basic block device operations.

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge with master

Keep experimental up to date with changes from master

[EGD-5795] Fix Some MMI data responses  are showing only title

Fix message processing for call waiting data response
Fix message processing for call barring data response

[EGD-5028] Add batt critical level db

Battery critical level sotred in
database.