[EGD-6019] Revert of two commits

This reverts commit b6416b15dac3a638d803681fbad8746b1808b6aa.
This reverts commit e2f3882d8a0194ae6f74bfc5ab6104c368174517.

[EGD-6019] Minimum settings ownership lifetime fixups

added weakptr link to settings and checks
    it wont crash on deinitialized setings now
Pseuto UT are passing
Added:
    - deregistration on Settings destrution
    - weak referencing of Service to not crash Settings on missuse
    - Proxy as initialization parameter to Settings
Unused code removed
Enabled tests to be written for Settings

[EGD-6657] ApplicationDesktop clean-up

This PR cleans-up `ApplicationDesktop` after recent changes in
home screen notifications handling.

[EGD-6676] PhoneLock handling with ServiceDesktop

Replaced old PhoneLock handler in ServiceDesktop with new
interactions with Application Manager PhoneLockHandler.

[EGD-6641] Added Notifications to LockedPhone popup

Added NotificationsModel to LockedPhone popup window.

[EGD-5884] Added Lock Screen popup handling

Moved lock screen window to popup. Split DesktopMainWindow into
two parts (popup and regular). Added LockPhoneHandler into
ApplicationManager.

[EGD-6637] Cleanup locks structure

Renaming existing locks namespace and created proper directory
structure.

[EGD-5703] Fix SimCard topBar icon on Desktop

In initial design a `TobBar`'s SimCard icon with number is supposed
to display on the home screen only if there are two cards inserted.
Because of the hardware limitations (there is no way of telling if
there is a single or two cards inserted) the established consensus is
that home screen should not display SimCard widget unless it's
indication error state.

Although in the task description there is only home screen mentioned,
the behaviour was established for all `ApplicationDesktop`'s windows.

[EGD-6456] ListView based desktop notification

This PR provides following changes in notifications:
- notifications were extracted as widget for pop-up-based
locked-screen implementation
- notifications are ListView based implemented
- the most recent notification is displayed on the top of the list

[EGD-6426] Fix sim card not being detected

Adds selected sim read from settings.

[EGD-6527] Internationalization API unification

Single api to rule i18n
all calls to localistaion in cpp files unified
cut off ass many dependencies in i18n header as possible

[EGD-6486] Fix for settings not avaialble at phone startup

Fixed the comparison function of EntryPath objects.

[EGD-6494] Application Manager on action switch fix

Application Manager switch on Action no longer causes to
newly opened application main window switch but it
calls declared action handler.

[EGD-6347] Refactored phone modes handling in applications

PhoneModeObserver doesn't work properly in applications.
Applications have to handle the phone mode changes via AppMgr.
Phone mode and tethering handlers separated.

[EGD-6208] Add blocking phone mode changes during tethering

When the tethering is enabled, the phone mode shouldn't change,
now, any attempt ends with a notification

[EGD-6433] Implement SIM PIN enable request

Implement SIM PIN enable/disable request
in PinLockHandler

[EGD-4736] Change PIN windows

Implement changing SIM PIN code flow

[EGD-6209] Tethering confirmation popup added

Provided a tethering confirmation popup.
The popup shows up once a USB cable is connected to a PC.

[EGD-4734] Add PIN settings window

This window displays switch button for
disabling/enabling pin code for sim card.
Its also starting point for changing pin code.
Added actions for enabling and disabling
pin code for sim card.
Added method for checking if pin code is
set for sim card.

[EGD-6283] Fix to slow Application Desktop start

ApplicationDesktop start was slowed down by two synchronous DB calls:
-get unread threads count
-get unread calls count
Both were replaced with asynch versions.