Allow a setting to make tickets private.
Only the author of the ticket and project admins would be able to see them.
This has been implemented between commit: http://209.132.184.222/progit/cc35057c76b1b43d7d06441ad57eb3f00fcb5f41 and commit: http://209.132.184.222/progit/c8c6697982ebe045617b043384393d7d69b3abba