"Clear" button in the Mixer window

When working on a passage in a score, if I've checked "solo" or "mute" on certain instruments, it would be convenient to have a way of clearing all the checked boxes when I want to go back to hearing all the parts together. As it is, I need to manually scroll up and down and look for checked boxes to be sure I didn't forget to uncheck one. A single "clear" button would solve this. Or is there already a way to do it?