[#9489] added invisible labels for queries

Contributed by Romano Licker.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@7678 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/queries/_columns.html.erb

@@ -1,6 +1,8 @@
 <table style="border-collapse: collapse; border:0;">
   <tr>
-    <td style="padding-left:0"><%= select_tag 'available_columns',
+    <td style="padding-left:0">
+      <%= label_tag "available_columns", l(:description_available_columns), :class => "hidden-for-sighted" %>
+      <%= select_tag 'available_columns',
               options_for_select((query.available_columns - query.columns).collect {|column| [column.caption, column.name]}),
               :multiple => true, :size => 10, :style => "width:150px" %>
     </td>
@@ -10,7 +12,9 @@
       <input type="button" value="&#8592;"
        onclick="moveOptions(this.form.selected_columns, this.form.available_columns);" />
     </td>
-    <td><%= select_tag 'c[]',
+    <td>
+      <%= label_tag "selected_columns", l(:description_selected_columns), :class => "hidden-for-sighted" %>
+      <%= select_tag 'c[]',
               options_for_select(query.columns.collect {|column| [column.caption, column.name]}),
               :id => 'selected_columns', :multiple => true, :size => 10, :style => "width:150px" %>
     </td>