Jaunt fix + airflow fix

Created by: clusterfack

Details:

Jaunt with a low enough cooldown would allow you to double cast jaunt making it flip the fuck out, so instead your spells are now silenced during jaunt. Your click and attack delayers as a jaunter are now delayed until the end of the jaunting session.

Airflow now checks for flags & invulnerable, which is the flag that is meant to prevent effects from occurring to that atom. This should fix an issue I've been seeing since hellish ZAS was recently turned on from virtualhearers and jaunters being blown into things.

Also fixed another reported bug that huds would report on invisible people, they lacked the see_invisible check that mechs had.