Merged r11390 from trunk to 2.2-stable.

Bulgarian translation of jstoolbar-bg.js updated by Ivan Cenov (#13181)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.2-stable@11391 e93f8b46-1217-0410-a6f0-8f06a7374b81