[EGD-5593] Change SOS button occurrences in GUI

Due to the changes made in our desing 'SOS' button have to
be visible only on the unlock info screen (yet it
shouldn't be on the pin window). This PR fixes locked info
window as well as pin window.

[EGD-2514] Fix clock does not refresh

There was no refresh trigger that would cause items like clock
to display its up-to-date state while user is being inactive.
This PR solves that issue providing timer-based refresh trigger
that is dependent on user activity.

[EGD-5043] Add emergency call window

According to PurePhone design emergency call
window is needed after "SOS" callback at the screen lock.
This PR introduce implementation of emergency call window
and also refactor in the enter number window. Both windows
derives from new number window.

[EGD-5090] Add Brownout GUI window

Gui window will appear due to brownout
event. System shutdown will be also called.

Merge branch 'master' into stable

[EGD-4960] Settings Interface added parameter do distinguish global/app settings
[EGD-4960] global/local setting determined by enum value, unregister all variables in one call, ut updated
[EGD-4960] SettingsScope usage in SettingsMessages

[EGD-4801] Add application-wide top bar manager

Applications configure the top bar once for all their windows.
Sometimes, windows need to configure top bars with its configuration.

[EGD-5250] Change time format on home screen and status bar

This commit changes time format displayed on home screen 
and on status bar by adding new locale for 12H format, 
which excludes am/pm suffix.
The new locale is set as new default format for time string.

Minor: Grammar typo fixed.

Merge branch 'master' into stable

[EGD-4995] Add changing passcode windows flow

Implement changing passcode windows flow

Merge commit 'c7dd6b399' into stable

Merge branch 'master' into stable

[EGD-2501] Add gsm powerdown due to battery

Gsm model power state maintenance based on battery level.

[EGD-4338] Fix menu notification dot

Each tile in Menu that uses notification dot
is be refreshed. It also solves missing dot
issue of EGD-4129 and lack of sound notification
on incoming text message.

[EGD-4836] Add firmware update test

Add test utility to update firmware via USB (service-desktop API)
Add timeout to harness port discovery

[EGD-5240] Add common timeout to python test harness
General purpose timeout based on signals library

[EGD-5239] Preserve 1Phone testing
In the long run test harness requires two phones,
but allow for one phone to still pass some test cases

[EGD-5166] Add query-callback synchronization mechanism

Receiver object cancels the callbacks at the end of its lifecycle.

[EGD-4973] Fix absent notifications on home screen

SMS and Calls notifications require default init
of respective data base. Displaying notifications
require wider space reservation for some digits
(e.g. `8`)

[EGD-4968] Change GUI service to optimize flow and memory management

Gui and Eink services refactor.
Displaying frames performance optimization.
Critical resources management.

[EGD-4648] Fix auto screen change

Action `UnlockSim` should be handled only if
there is ongoing SIM flow processing.

[EGD-4694] Add CPU frequency shift mechanism

The CPU frequency changes automatically which saves energy