ah but it already does have the ability to {somewhat} shortlist

Try Select Favourite Style, Shift-F9
from this Favourite Style dialog you can also reach Recently Played Styles
note the SAve Set and LOad set buttons lower left

After I search for a style for a song, I trim the Recent list with the Delete
and Save the Set in the same folder as the Song.

Now I have my Styles shortlist right beside the Song for reference.

Beyond what we have today this Favourite Styles management could be made more effective with some more Copy/paste/Arrange function

RrR