Performance: avoid querying all memberships in User#roles_for_project (#13301).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11508 e93f8b46-1217-0410-a6f0-8f06a7374b81
Adds "tracker-[id]" CSS class to issues (#13309).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11509 e93f8b46-1217-0410-a6f0-8f06a7374b81
Performance: avoid one "SELECT 1 ..." query per project on user memberships form.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11510 e93f8b46-1217-0410-a6f0-8f06a7374b81