CHANGES.md: Note ColumnSet style fix for no-scrollbars case
CHANGES.md: Note ColumnSet style fix for no-scrollbars case

kfranqueiro/dgrid,maier49/dgrid,dylans/dgrid,dylans/dgrid,kfranqueiro/dgrid,kfranqueiro/dgrid,dylans/dgrid,maier49/dgrid,maier49/dgrid