Added a checkbox on custom query form to explicitly say if the query uses default columns or not.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@783 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/queries/_columns.rhtml

@@ -0,0 +1,7 @@
+<% content_tag 'fieldset', :id => 'columns', :style => (query.has_default_columns? ? 'display:none;' : nil) do %>
+<legend><%= l(:field_column_names) %></legend>
+<% query.available_columns.each do |column| %>
+<label><%= check_box_tag  'query[column_names][]', column.name, query.has_column?(column) %> <%= l("field_#{column.name}") %></label><br />
+<% end %>
+<%= hidden_field_tag 'query[column_names][]', '' %>
+<% end %>