Added a ship flag to make detail boxes unaffected by model detail settings.

git-svn-id: svn://svn.icculus.org/fs2open@10284 387891d4-d844-0410-90c0-e4c51a9137d3
Fixed $Velocity Inherit not working right with regards to the AI and lead sights.

git-svn-id: svn://svn.icculus.org/fs2open@10285 387891d4-d844-0410-90c0-e4c51a9137d3