[EGD-6520] Show factory data on technical information window

Remove mocked data and read real data from settings db

[EGD-6673] Temporary fix cellular requesting for pin

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

[EGD-6533] Fix switching window after editing contact

After saving edited contact, app was switched to
contact lists window instead of contact details.

[EGD-6641] Added Notifications to LockedPhone popup

Added NotificationsModel to LockedPhone popup window.

[EGD-6639] Fix call icon misalignment

Align call window arcs

[EGD-6453] Warning when adding incorrect event

When adding to Calendar an event which is incorrect  (e.g. has empty
title or end which is sooner than start) warning window appears.

[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-6254] Add meditation end timeout

Added timeout on meditation end screen
to automatically return to main screen
of meditation app.

[EGD-6583] Add send text

Adds missing send text during
incoming call.

[EGD-6637] Cleanup locks structure

Renaming existing locks namespace and created proper directory
structure.

[EGD-6315] Fix issues during saving new APN

- disallow saving empty APN form - at least `Name` must be provided,
- show `Save` button only if `Name` field is not empty,
- return to APN list window after adding/editing/deleting APN
  or setting APN to default

[EGD-6600] Add rejected call message

Adds rejected call message
instead of ended call.

[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-6495] Add pause/resume/stop to MP

Added basic Pasue/Resume/Stop actions to confirm
that related Audio service operations work

Added handling of headset OK for Pause/Resume/Stop actions
while in Music Player

[EGD-6064] Add connecting and pairing bluetooth states

Pairing and connecting states are now visualized
in All devices window to inform phone user what is happening.

[EGD-5776] Replace incorrect block contact icon with the correct one

Replace incorrect block contact icon with the correct one.

[EGD-6613] Audio assets tags are not displayed

When selecting ring/sms/notification sound the title from audio tags is
displayed. If tags are empty the filename is shown.

[EGD-5849] Make calculator compute previous operations

Modify calculator behavior according to PO input:
* Compute existing equation before entering next operation
* Limit digit input to 7 digits
* Start each number input from empty input

[EGD-6337] Add desktop tethering notification

This PR adds home screen tethering notification. The notifications
allows user to disconnect tethering from desktop by focusing on
the notification and pressing `KEY_ENTER`

This PR adds also home screen notifications icons in `.png` format.
Icons shall be converted to `.vpi` and used in other tasks regarding
home screen notifications.