OpenMW-CS: Swappable key binding presets
Users should be able to swap and save key binding settings.
Use Case: User would like to switch the kind of editing they are preforming, e.g. landscaping vs scene building might have control flow with one preset over another
(RM-3683 from redmine: created on 2016-12-20 by Jeffrey Haines, , closed on 2018-06-12 by nobody)