Merged r11556 from trunk to 2.3-stable (#13391)

Czech translation changed by Karel Pičman.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11616 e93f8b46-1217-0410-a6f0-8f06a7374b81
Merged r11614 from trunk to 2.3-stable (#13450)

Czech translation changed by Karel Pičman.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11617 e93f8b46-1217-0410-a6f0-8f06a7374b81
Merged r11615 from trunk to 2.3-stable (#13458)

Bulgarian translation ordered by Ivan Cenov.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11618 e93f8b46-1217-0410-a6f0-8f06a7374b81
Merged r11613 from trunk to 2.3-stable.

Fixing HTML in groups index view.

Contributed by Gregor Schmidt.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11619 e93f8b46-1217-0410-a6f0-8f06a7374b81