1304 track drag to filtered playlist - 5 bugs [#7279]

[chrisjj]

1 In Tree, select a playlist of 93 tracks
2 In search bar, select Current Selection and enter the name of the 54th track and anything else to ensure only it is shown
3 Drag a track from Now Playing to below the the displayed track
4 See that tracklist shows the dragged track added

Expected: first # value 54 unchanged
Observed: first # value changed to 1 - Bug #1

Expected: second # value = 55 (new)
Observed: second # value = 2 - Bug #2

5 Clear the quick search
6 Look by eye for the added track

Expected: added track found (with status bar showing track qty 94)
Observed: added track not found (with status bar showing track qty 93) - Bug #3

7 In Tree select a different playlist
8 In Tree select the original playlist
9 Inspect tracks, seeing that despite Bug #3, the added track is visible and status bar shows track qty 94)

Expected: searched track unchanged at #54.
Observed: searched track moved to #2 (not #1 as expecred from Bug #2 above) - Bug #4.

Expected: added track at #55.
Observed: added track at #4 - Bug #5.

Tracked at http://www.ventismedia.com/mantis/view.php?id=7279

[Lowlander]

More importantly this holds true when tested on the latest release of MediaMonkey which is 4.0.0.1346.