When grouping records, we should be able to sort the groups by those little “summary fields” instead of ONLY being able to sort by the grouped field itself.
In other words, we could group our records by PROJECT NAME, but then sort the groups based on whichever group has the “newest date” or whichever group has the “highest total dollar amount” or whichever group has the “largest number of projects” or whatever.
We can already choose all of these options by clicking on those little “summary fields” which appear in the group headers — but we’re not able to sort on those “summary fields”. So we’re allowed to display these “summary” options onscreen, but we’re not allowed to sort by them.