Makes parent parent assignment work on project form.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/work@2150 e93f8b46-1217-0410-a6f0-8f06a7374b81

nested_projects/app/helpers/projects_helper.rb

@@ -33,4 +33,8 @@ module ProjectsHelper
             ]
     tabs.select {|tab| User.current.allowed_to?(tab[:action], @project)}     
   end
+  
+  def project_hierarchy_collection_for_select(projects)
+    projects.sort_by(&:lft).collect {|p| [('>' * p.level) + p.name.to_s, p.id]}
+  end
 end