[EGD-4853] Add Wake up GSM modem on demand

System wakes up Cellular when there is a need to communicate
with the modem, e.g. to handle an outgoing call

[EGD-5304] Add new way of system close

Unified method of closing
the system orchestrated by
system manager

[EGD-5916] Removed duplicated connect in ServiceCellular.cpp

Removed duplicated connect in ServiceCellular.cpp causing
service init errors.

[EGD-5326] Fixed AT commands harness utility

We can now use test harness to send and check at commands

[EGD-5741] Change cellular DataReceiverHandle refactor

All messages have been moved to separate handlers.

[EGD-5831] Fix handling URC

Fix handling URC like no carrier

[EGD-5737] Merge master into experimental

Synchronize with master before merging

[EGD-5817] Fix USD menu navigation

All menu levels available via USD queries

[EGD-5740] Change cellular message handlers

Phone modes dependent message handlig is moved to separated
handlers.

[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-5692] Change URC parsing mechanism

Improved the mechanism for processing URC messages
so that long messages and those containing end of line
inside messages can be handled also if income
in more than one data chunk.

[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-5794] Fix stack size overflow

There is not enough space in service cellular
stack which is causing debug problems.

[EGD-5541] Sim card check refactor

Moved checking for a SIM card logic from
application level to service cellular.
Provided an action in response to application messages.

[EGD-5597] Fix messages overflowing length

Current sms length is bound by 7*67 characters. This PR
enforce that limit on ApplicationMessages level.
Additionally PR solve:
 - corner case problem with invalid cursor position in TextBackup
 - EGD-4408 fix of label on desktop menuWindow