Hud / notification for Bluetooth devices

[AlexPerathoner]

Before opening the issue, have you...?

• [X] Searched for existing issues

Is your feature request related to a problem? Please describe

• Stopping OSDUIHelper prevents the HUD telling the bluetooth keyboard is connected / disconnected from appearing.
• SlimHUD should replace that, too
• HUDs used for volume etc wouldn't work -> show notification(?)

Describe the solution you'd like

.

Describe alternatives you've considered

No response

Anything else?

No response