Switches in Sideband finally acting as expected

[markqvist]

For a looong time, there's been an issue with the switches in Sideband, where you had to hit exactly the button part of the switch to toggle it, instead of being able to just touch/click anywhere on the switch.

This was actually the intent from the KivyMD UI framework, that Sideband uses, and there was no official way to change the behaviour.

Luckily, I finally got around to implementing a small hack that extends the hitbox, so now it's much easier to operate the switches in Sideband 0.5.4 :)