Toggle custom query filter checkbox sets by clicking on label
From the TicketQuery page, double-click on a checkbox, or its label, checks it and clears the neighbour checkboxes. Double-click on the label to the left of the set of checkboxes toggles the state of all checkboxes.
If you have any issues, create a new ticket.
Download the zipped source from here.
Double-click label flips checkboxes.