Update Active Spell Icons
MW displays an icon for each magic effect affecting the player in the bottom right corner of the screen (The tooltip shows the contribution of each spell to the magic effect magnitude). The current implementation in OpenMW only displays a dummy icon there.
(RM-286 from redmine: created on 2012-05-18 by Marc Zinnschlag, , closed on 2013-03-03 by scrawl ., relates #92 (closed))