Adds a optgroup for groups in users/groups select tags.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@6307 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/issues/_attributes.rhtml

@@ -8,7 +8,7 @@
 <% end %>
 
 <p><%= f.select :priority_id, (@priorities.collect {|p| [p.name, p.id]}), {:required => true}, :disabled => !@issue.leaf? %></p>
-<p><%= f.select :assigned_to_id, (@issue.assignable_users.collect {|m| [m.name, m.id]}), :include_blank => true %></p>
+<p><%= f.select :assigned_to_id, principals_options_for_select(@issue.assignable_users, @issue.assigned_to), :include_blank => true %></p>
 <% unless @project.issue_categories.empty? %>
 <p><%= f.select :category_id, (@project.issue_categories.collect {|c| [c.name, c.id]}), :include_blank => true %>
 <%= prompt_to_remote(image_tag('add.png', :style => 'vertical-align: middle;'),

app/views/issues/_form_update.rhtml

@@ -1,7 +1,7 @@
 <div class="attributes">
 <div class="splitcontentleft">
 <p><%= f.select :status_id, (@allowed_statuses.collect {|p| [p.name, p.id]}), :required => true %></p>
-<p><%= f.select :assigned_to_id, (@issue.assignable_users.collect {|m| [m.name, m.id]}), :include_blank => true %></p>
+<p><%= f.select :assigned_to_id, principals_options_for_select(@issue.assignable_users, @issue.assigned_to), :include_blank => true %></p>
 </div>
 <div class="splitcontentright">
 <% if Issue.use_field_for_done_ratio? %>

app/views/issues/bulk_edit.rhtml

@@ -27,7 +27,7 @@
 	<label><%= l(:field_assigned_to) %></label> 
 	<%= select_tag('issue[assigned_to_id]', content_tag('option', l(:label_no_change_option), :value => '') +
                                  content_tag('option', l(:label_nobody), :value => 'none') +
-                                 options_from_collection_for_select(@assignables, :id, :name)) %>
+                                 principals_options_for_select(@assignables)) %>
 </p>
 <% if @project %>
 <p>