in js/details.js [521:534]
function severitySort() {
if (sortTrack['severity']) {
bugset.sort(sortSeverityAsc);
} else {
bugset.sort(sortSeverityDesc);
}
updateDefaultSortSettings('severity', sortTrack['severity']);
sortTrack['severity'] = !sortTrack['severity'];
updateCheckedState();
clearRows();
prepPage();
populateRows();
}