fix confirmation page has broken HTML when a project folding sub project is deleted.
Contributed by Haruka Yoshihara.
git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.0-stable@10084 e93f8b46-1217-0410-a6f0-8f06a7374b81
:rhtml and :rxml were finally removed as template handlers at Rails 3.1 RC4.
git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@6998 e93f8b46-1217-0410-a6f0-8f06a7374b81