Tweaks to names on tracks

This makes them opaque when the track height is low.
It also improves on painting with low stereo tracks, where the name previously was clipped.

src/TrackPanel.cpp

@@ -1093,6 +1093,7 @@ void TrackPanel::DrawTracks(wxDC * dc)
    // Draw the rest, including the click-to-deselect blank area below all
    // tracks
    DrawEverythingElse(context, region, clip);
+   TrackArt::DrawTrackNames( context, GetTracks(), region, clip );
 }
 
 /// Draws 'Everything else'.  In particular it draws: