Combat with water creatures do not end upon exiting water

In vanilla morrowind when enganging combat with water creatures, combat ends immediately when you exit the water. In OpenMW, combat continues when exiting the water. So unless you kill them you have to exit the cell the water creatures is in for cobat to end.

(RM-2678 from redmine: created on 2015-06-13 by William Sogge, , closed on 2017-02-10 by R. D., relates #2767 (closed))