Use named routes or helpers.

git-svn-id: http://svn.redmine.org/redmine/trunk@13656 e93f8b46-1217-0410-a6f0-8f06a7374b81
Removed duplicated code.

git-svn-id: http://svn.redmine.org/redmine/trunk@13657 e93f8b46-1217-0410-a6f0-8f06a7374b81
Removed useless local variable.

git-svn-id: http://svn.redmine.org/redmine/trunk@13658 e93f8b46-1217-0410-a6f0-8f06a7374b81