[EGD-6074] Add system message and window for BT initialization error

Purpose of added system message is to sent information about bluetooth
initialization result from bluetooth service to application settings.
Added window will print error if initialization fails.
Further integration in service bluetooth is required.

[EGD-6073] Fix text formatting in retry windows

Error message in retry windows was displayed incorrectly.

[EGD-6024] Return to All Devices window after attempt to retry action

Execution of retry pairing/unpairing/connecting took too long
to wait for it on retry popup. Fixed minor bugs.

[EGD-6010] Fix addres in retry window

Address was lost while being forwarded to the retry window.

[EGD-5304] Add new way of system close

Unified method of closing
the system orchestrated by
system manager

[EGD-5984] Add BT implementation of added GUI actions

Implemented BT-side actions for GUI usage, e.g. connection status

[EGD-5940] Add BT device unpairing

Implemented possibility to forget/unpair a device via GUI

[EGD-5982] Fix no window refresh after pairing

Fixes no refresh after finished scan

[EGD-5912] Add forget bluetooth device feature

Added button on AllDevices window, and handling for it.
Added needed messages for communication with service bluetooth.
Feature is now complete on application settings side.
Further integration in service bluetooth is needed.

[EGD-5765] Add BT docs

Added simple documentation about profile manager

[EGD-5861] Complete bluetooth connecting process on settings side

Enable connecting BT devices in settings.
Connect popup and add adjust messages for connection error handling.

[EGD-5879] Fix BT uart error

To be able to properly send data via UART, the frequency has to
be higher (to be fixed in the future)

[EGD-5764] Implement handling multiple BT profiles

To be able to connect to the BT device with more than one audio
profile, we need something to manage those profiles. Created here
ProfileManager made it convenient
To be able to work properly with BT, CPU freq has to be at least
at Level_5 - to be fixed!

[EGD-2630] Add pairing passkey handling on bluetooth settings side

Connect prompt window and add missing messages.

[EGD-2634] Add pairing process result confirmation

Enable pairing BT devices in settings.
Connect popup and add adjust messages for pairing error handling.

[EGD-5737] Merge master into experimental

Synchronize with master before merging

[EGD-5848] Fix bluetooth pairing key import

After BT refactor settings init for key storage has been moved,
thus in the initial phase settings were unavailable and btstack
couldn't import keys from storage

[EGD-5700] Fix Bluetooth pairing

To be able to proper propagate the pair message there was a need
for Command wrapper (to be able to send command and parameter in
one piece)

[EGD-4340] Refactor bluetooth settings and add device windows

Rewrote these windows in a proper way.
Fixed few minor issues.
GUI adjustments.

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master