UI fixes

Fixed: Series search won't break when term contains brackets
Fixed: Attempting to apply the activity spinner incorrectly

src/UI/Navbar/Search.js

@@ -34,11 +34,8 @@ define(
 
         var substringMatcher = function() {
             return function findMatches(q, cb) {
-                // regex used to determine if a string contains the substring `q`
-                var substrRegex = new RegExp(q, 'i');
-
                 var matches = _.select(SeriesCollection.toJSON(), function (series) {
-                    return substrRegex.test(series.title);
+                    return series.title.toLowerCase().indexOf(q.toLowerCase()) > -1;
                 });
 
                 cb(matches);

src/UI/jQuery/jquery.spin.js

@@ -21,6 +21,10 @@ define(
 
             var icon = this.find('i').andSelf('i');
 
+            if (!icon || !icon.attr('class')) {
+                return this;
+            }
+
             var iconClasses = icon.attr('class').match(/(?:^|\s)icon\-.+?(?:$|\s)/);
 
             if (iconClasses.length === 0) {