Generate project identifier automatically with JavaScript (#9225).

Based on Jan Schulz-Hofen's patch.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11129 e93f8b46-1217-0410-a6f0-8f06a7374b81
More specific message for project identifier (#9225).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11130 e93f8b46-1217-0410-a6f0-8f06a7374b81