With the new "feature" of random, and not-so-random, NPCs haning out quests/missions without the player even being able to say "no" to them...

We now need a simple "Abandon Mission" option in the Pip-Boy.

This might even help with some missions that "fail" (even though we complete them) and get "stuck" in the missions list...with no way to activate/de-activate them, or get them off our list.