1256 Useless track drop offered [#5868]

[chrisjj]

1 In a playlist's Track List or Now Playing, select one more more tracks
2 Drag to just above top of selection, just below, or within e.g.


Expected: drop not offered (since drop should do nothing) i.e. no-entry sign shows
Observed: drop offered i.e. drop indicator line shows

Tracked at http://www.ventismedia.com/mantis/view.php?id=5868