Bluetooth settings: handle missing permissions / avoid crash

[khao-soi]

fixes #1637

@dennisguse what do you think?

[dennisguse]

I would switch the if aka first check the negative case and return. This way we avoid the else and the 2nd if.

An additional option is to to disable these options if permissions are not granted (and likely set a proper preference summary).

[khao-soi]

I would switch the if aka first check the negative case and return. This way we avoid the else and the 2nd if.

Good point. I have revised the code.

[dennisguse]

And again: make it one commit only.
The code is that simple to understand that two commits make git history hard to read ;)