Fixed that issue list PDF export displays ID column twice (#13630).

Contributed by F Schroedter.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11693 e93f8b46-1217-0410-a6f0-8f06a7374b81
Code cleanup (#13630).

Contributed by F Schroedter.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11694 e93f8b46-1217-0410-a6f0-8f06a7374b81