Role-based issue custom field visibility (#5037).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12012 e93f8b46-1217-0410-a6f0-8f06a7374b81
Fills locales with new strings.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12013 e93f8b46-1217-0410-a6f0-8f06a7374b81
Fixed that relations to issues that are not visible are displayed in the issue history (#1005).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12014 e93f8b46-1217-0410-a6f0-8f06a7374b81