Updates:

1. Fixed thread view, it didn't really seem to work before at all.
2. Removed excess buttons for notes, will extend into a drop down menu
   TODO.

js/util.js

@@ -133,6 +133,8 @@ function find_nodes(selector, parentEl) {
 function find_parent(el, selector) {
 	while (el && !el.matches(selector)) {
 		el = el.parentNode;
+		if (!el.matches)
+			return undefined;
 	}
 	return el;
 }