Inventory windows don't update when changing items by script
You can get spells when you wear rings or amulets (OnPCEquip + AddSpell). It would be nice if the new spell would appear in the PCs list of owned spells right after equipping. Right now you have to exit the menumode and enter again to be able to see/select/ready that spell. Whatsoever when selecting a spell that's already in the list it gets blue so there is something updated instantly - maybe it's not that hard to update the entries of the list as well.
In case this is the same with stats (e.g. ring gives you +10 speed) it would be nice if that's updated as well. Same thing for maps. If a ring casts "detect creature" on equipping the map could instantly show the icons.
There are already windows that are updated regarding adding and removing thing in menumode, namely the inventory and the char portrait.
(RM-2967 from redmine: created on 2015-10-11 by Who Knows, )