FIX: Trigger reformat when scrollbar is enabled / disabled externally.
FIX: Trigger reformat when scrollbar is enabled / disabled externally.

ruleless/CEGUI,ruleless/CEGUI,OpenTechEngine/CEGUI,ruleless/CEGUI,OpenTechEngine/CEGUI,OpenTechEngine/CEGUI,OpenTechEngine/CEGUI,ruleless/CEGUI