Don't use the bootstrap3 title plugin on th elements, it doesn't work

properly for those
 - Legacy-Id: 12115

Author: OleLaursen

ietf/static/ietf/js/ietf.js

@@ -194,7 +194,7 @@ $(".snippet .show-all").click(function () {
 // });
 
 // Use the Bootstrap3 tooltip plugin for all elements with a title attribute
-$('[title][title!=""]').tooltip();
+$('[title][title!=""]').not("th").tooltip();
 
 $(document).ready(function () {
     // add a required class on labels on forms that should have