A few things/requests about Selection Properties panel.

1st:
I think that those name/value tabs in SP are so selfexplanatory that they should have a toggle on/off or hide option. I very much would like to see them gone, as they take valuable space.

2nd:
It would be nice to see that horizontal scrollbar gone when for example the list of performers is a long one. Maybe it is an option to put them vertically instead of horizontal. Or the same as in the playlist view, Autoscale columns with windowsize, that makes the horizontal bar disappear. (this reminds me of the following point)

3d: Autoscale columns with windowsize didn't work as I expected. I expected it would define the contents of a column as a lenght of characters, for example the title of a song, and shrinks or expands the column to fit that. But all it does is hiding the horizontal scrollbar. Columns that are half visible when I click it stay half visible. This makes it kinda useless imho, for when I select some columns, fit them to the playlist view exactly, there is also no horizontal scrollbar. Only when I choose more columns than fitting on playlist view it toggles the scrollbar, but that makes no sense, as I had chosen more columns outside the playlist view to use the information that is in that column, so why would I hide that bar?

Hope you will look into these things.

(edit: got confused by horizontal and vertical lol...)