status/bluetooth: Indicate progress on toggle
Turning bluetooth on or off can be very slow – 10-15 seconds on my system – and we currently don't provide any feedback that something is indeed happening until the state changes at last.
Address this by temporarily changing the icon to acquiring
when
toggling the state.
As we don't get notified when the request fails, force an :active change after a (generous) timeout to avoid getting stuck with the temporary icon.
Fixes #5773 (closed)