Warn the user as to why a .trk is not showing in the Replay menu

[Lixma 06]

I just ran into a nasty issue whereby I was trying to run a .trk from a fellow flyer but it would not appear in the Replay menu.

After some digging I found the reason - the .trk was recorded on a map I don't have.

So instead of leaving the player in the dark - warn them about the file's incompatibility.

Edited January 31 by Lixma 06