make toggleFieldset work again on settings

lib/widget/filters.rb

@@ -17,7 +17,7 @@ class Widget::Filters < Widget::Base
             :class => "select-small",
             :name => nil
     end
-    (table + select)
+    content_tag(:div, table + select)
   end
 
   def selectables

lib/widget/group_bys.rb

@@ -45,6 +45,7 @@ class Widget::GroupBys < Widget::Base
 
   #TODO: replace me with a drag&drop group_by selector
   def render
+    content_tag :div do
       content_tag :table, :style => "border-collapse: collapse; border: 0pt none;",
       :id => "group_by_table" do
         content_tag :tbody do
@@ -54,6 +55,7 @@ class Widget::GroupBys < Widget::Base
         end
       end
     end
+  end
 
   def selected_group_bys(axis)
     content_tag :select, "", :style => "width: 180px;", :size => "4",