When I view a tree in My Folders, I would like to choose which columns of metadata I see and their order.

To Repro:
In 'My Folders', select 'My Music' or the 'Album Artist / Album' hierarchical tree playlist
In the window to the right, I can select columns, but can't do anything with them beyond Sort.

1) Either a dialog box where the columns can be selected and ordered; or right click columns to add/move, with drag/drop to re-order.
2) Be able to change the column width
3) Be able to see Metadata for the whole tree or high-level branch selected and not just the lowest level branch.