WebUI: Prevent default action of links

This prevents anchors from being added to the URL.

src/webui/www/public/filters.html

@@ -1,8 +1,8 @@
                 <ul class="filterList">
-                    <li id="all_filter"><a href="#" onclick="setFilter('all');"><img src="images/skin/filterall.png"/>_(All)</a></li>
-                    <li id="downloading_filter"><a href="#" onclick="setFilter('downloading');"><img src="images/skin/downloading.png"/>_(Downloading)</a></li>
-                    <li id="completed_filter"><a href="#" onclick="setFilter('completed');"><img src="images/skin/uploading.png"/>_(Completed)</a></li>
-                    <li id="paused_filter"><a href="#" onclick="setFilter('paused');"><img src="images/skin/paused.png"/>_(Paused)</a></li>
-                    <li id="active_filter"><a href="#" onclick="setFilter('active');"><img src="images/skin/filteractive.png"/>_(Active)</a></li>
-                    <li id="inactive_filter"><a href="#" onclick="setFilter('inactive');"><img src="images/skin/filterinactive.png"/>_(Inactive)</a></li>
+                    <li id="all_filter"><a href="#" onclick="setFilter('all');return false;"><img src="images/skin/filterall.png"/>_(All)</a></li>
+                    <li id="downloading_filter"><a href="#" onclick="setFilter('downloading');return false;"><img src="images/skin/downloading.png"/>_(Downloading)</a></li>
+                    <li id="completed_filter"><a href="#" onclick="setFilter('completed');return false;"><img src="images/skin/uploading.png"/>_(Completed)</a></li>
+                    <li id="paused_filter"><a href="#" onclick="setFilter('paused');return false;"><img src="images/skin/paused.png"/>_(Paused)</a></li>
+                    <li id="active_filter"><a href="#" onclick="setFilter('active');return false;"><img src="images/skin/filteractive.png"/>_(Active)</a></li>
+                    <li id="inactive_filter"><a href="#" onclick="setFilter('inactive');return false;"><img src="images/skin/filterinactive.png"/>_(Inactive)</a></li>
                 </ul>

src/webui/www/public/scripts/contextmenu.js

@@ -114,6 +114,7 @@ var ContextMenu = new Class({
         /* menu items */
         this.menu.getElements('a').each(function(item) {
             item.addEvent('click', function(e) {
+                e.preventDefault();
                 if (!item.hasClass('disabled')) {
                     this.execute(item.get('href').split('#')[1], $(this.options.element));
                     this.fireEvent('click', [item, e]);