"StopCombat" doesn't cause followers to stop combat

In OpenMW, StopCombat only stops the combat of the actor it is called on. This could be a problem because in OpenMW the actor it was called upon will resume attacking again if a follower, like a summoned creature, is still fighting.

In original Morrowind, StopCombat seems to stop the combat of all actors in the area when it's called. This would solve the above issue, but it also causes what seems like a bug in one of the game's quests, HR_RescueSarethi, where I think it is supposed to just stop the escorted NPC from attacking enemies but actually causes the enemies to stop attacking as well.

It's conceivable that a mod could rely on the original game's behavior to stop all combat with a single StopCombat. But my feeling at the moment is we should probably stop combat for the actor and all of its followers and escorters.

(RM-3857 from redmine: created on 2017-05-03 by R. D., , closed on 2017-10-23 by nobody, duplicates #1930 (closed))