in js/details.js [536:549]
function prioritySort() {
if (sortTrack['priority']) {
bugset.sort(sortPriorityAsc);
} else {
bugset.sort(sortPriorityDesc);
}
updateDefaultSortSettings('priority', sortTrack['priority']);
sortTrack['priority'] = !sortTrack['priority'];
updateCheckedState();
clearRows();
prepPage();
populateRows();
}