Alright...this is very simmilar to a request I made ages ago when I was working on the Chaos Project Collab...
the Mission Menu is 2-part:
1 The Mission Selection system
2. The Mission Log
The Mission Log itself would be a Quest Log, showing the missions that have been completed and possibly a rating or something for how they completed it.
The Mission Select System would display the mission's objectives AND allow one to teleport to the location of said mission.
Easiest way to put it, and sorry but I fail at scripting, good luck though!