Fixes #6642 Mail user filter search hangs with javascript errors in browser

Author: tbrehm

interface/web/mailuser/templates/mail_user_filter_list.htm

@@ -21,7 +21,7 @@ <h1><tmpl_var name="list_head_txt"></h1>
                 <tr>
                     <td><input class="form-control" type="text" name="search_rulename" value="{tmpl_var name='search_rulename'}" /></td>
                     <td class="text-right">
-                        <button type="button" class="btn btn-default formbutton-default formbutton-narrow" name="Filter" id="Filter" value="{tmpl_var name="filter_txt"}" data-submit-form="pageForm" data-form-action="mail/mail_user_edit.php"><span class="icon icon-filter"></span></button>
+                        <button type="button" class="btn btn-default formbutton-default formbutton-narrow" name="Filter" id="Filter" value="{tmpl_var name="filter_txt"}" data-submit-form="pageForm" data-form-action="mailuser/mail_user_filter_list.php"><span class="icon icon-filter"></span></button>
                     </td>
                 </tr>
                 </thead>