Exclusive Toolbar Buttons
How can I make a toolbar button added to an action group uncheck itself when it's clicked again?
You can turn it off with
for the group.
This will disable the exclusive check of the buttons. I want to keep this while being able to uncheck all the buttons by clicking the checked button.
Something's not clear. In your scenario you have a checkable button in an exclusive group box that is checked and when you click on it again to make it unchecked, you want all other buttons to become also unchecked ?