Removed duplicate HTML element id (#12122).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11211 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/gantts/show.html.erb

@@ -12,7 +12,7 @@
     <%= render :partial => 'queries/filters', :locals => {:query => @query} %>
   </div>
 </fieldset>
-<fieldset id="filters" class="collapsible">
+<fieldset class="collapsible">
   <legend onclick="toggleFieldset(this);"><%= l(:label_display) %></legend>
   <div>
     <table>