Perhaps I am missing something but I can't seem to find a way to have one toggle button actually toggle the state of another button.
You can query if a button is pressed with $pressed = true/false..but you can't seem to actually change the pressed state.
This would be really handy for UI where only one button should be active at a time, and pressing a different button will toggle OFF the other button.
For example, clicking a different button here would switch the active quest.....
