Do not propose trackers which disallow parent_issue_id for new child issues (#22345)....
Do not propose trackers which disallow parent_issue_id for new child issues (#22345).
also removes the tracker_id from the "Add new child issue" link in case it
doesn't allow parent_issue_id
Patch by Jens Kraemer.
git-svn-id:
http://svn.redmine.org/redmine/trunk@15359 e93f8b46-1217-0410-a6f0-8f06a7374b81