Update activeValidationState if setting validation changed
Update activeValidationState if setting validation changed

This was removed from onGlobalSettingChanged but never re-added anywhere.

I've updated it to check for both the global and the active stack, since some settings modify only the global stack (such as layer height).

Contributes to issue CURA-2006.

totalretribution/Cura,totalretribution/Cura,ynotstartups/Wanhao,senttech/Cura,fieldOfView/Cura,Curahelper/Cura,Curahelper/Cura,hmflash/Cura,fieldOfView/Cura,ynotstartups/Wanhao,hmflash/Cura,senttech/Cura