Additional options in the deck view grouping/sorting menus: For example when grouping by Mana Value, add sort:”type” where it shows a divider or such between 2 drop creatures and 2 drop instants etc. doesn’t need to be a full title, just like a pale dividing line.
Or when sorting by a tag e.g. “draw” & sort by “mana value” theres lines dividing the mana values within each tag, or type within tag etc
e.g. the example image shown on this page
https://wiki.freepascal.org/ListBox_with_separators