refactor trigger function names for consistency
abstract nextthink setting based on wait and waitVariance
revert/replace commit 0438404 with alternative version, that doesn't break mover-groups

Revert "deprecate mover team fieldname in favor of groupname and add it to the fieldtable"
This reverts commit 04384047feed87a704a114b3b3d44e1ce715ba19.
Conflicts:
	src/gamelogic/game/g_mover.c