[EGD-6707] Add single number message notification

This PR provides implementation of home screen notification for
`notSeen` messages received from a single number. The "single-number:
`notSeen` message notification distinct from "multiple-number"
notification with the following features:
 - displaying formatted contact name
 - `onActivated` it switches to respective thread window (instead of
 all thread window) in `ApplicationMessages`

 The PR also introduced some `ActiveNotificationsModel` code refactor
 to align the implementation with `Single Responsibility Principle`

[EGD-6657] ApplicationDesktop clean-up

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

[EGD-6599] Add single number call notification

This PR adds proper notification on call notifications coming from
single number. To that end following changes have been introduced:
 * extension of Notification DB record with contact_id filed
 * use of `ContactRecordInterface` in `NotificationsRecordInterface`
 * extension of `Increment` query to require `PhoneNumber::View`
 * multiple minor changes on path from creating/handling
 `NotificationsRecord` to displaying respective notification.

[EGD-6673] Temporary fix cellular requesting for pin

Temporary fix for cellular pin request popup. To be fully
integrated with SimLockHandler.

[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-3119] Hide InputEvent's member fields

Use the InputEvent's convenience methods to express intent.

[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-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-6314] Phone mode widget visibility

Phone mode widget will be visible only on main screen, while entering
numbers or in emergency call mode. Also it will be disabled whenever NAT
widget is enabled.

[EGD-5744] Phone mode status bar widget

Added phone mode widget to top bar. The widget is mutually exclusive
with NAT widget. Phone mode is determined using phone mode observer.

[EGD-6009] Test and repair Update process

Fixes to improve Update process.

[EGD-5968] Fix PowerOff window

PowerOff window lifting done
to comply with given design.

[EGD-5969] Add battery charging UI

Battery charging UI modified
according to design

[EGD-5832] Status bar widgets refactor

Status bar SIM widget refactor
Status bar time widget recfactor
Status bar lock widget refactor
Separation of status bar time widget and desktop main window time widget
Fixed issue with wrong calculation of timezone based time

[EGD-5758] Restore auto locking timer in ApplicationManager

Restore auto-locking functionality

[EGD-5771] Create post update info window

Add post update info window.

[EGD-5737] Merge master into experimental

Synchronize with master before merging