Merge pull request #686 from hmhealey/plt172

PLT-172 Fixes TypeErrors and random jumping that occurs when clicking the scroll bar in the sidebar

web/templates/head.html

@@ -31,7 +31,7 @@
     <link href='/static/css/google-fonts.css' rel='stylesheet' type='text/css'>
     <link rel="stylesheet" href="/static/css/styles.css">
 
-    <script src="/static/js/perfect-scrollbar-0.6.3.jquery.js"></script>
+    <script src="/static/js/perfect-scrollbar-0.6.5.jquery.js"></script>
 
     <script src="/static/js/jquery-dragster/jquery.dragster.js"></script>