Move Y position, height, and minimized state into TrackView...

... and eliminate some unnecessary calls to SubstitutePendingChangedTrack,
because the track and the substitute store Y and height in their shared
TrackView object.

Also make GetMinimizedHeight() virtual to avoid inclusion of TrackPanel.h in
TrackView.cpp.

src/Printing.cpp

@@ -32,6 +32,8 @@
 
 #include "TrackPanelDrawingContext.h"
 
+#include "tracks/ui/TrackView.h"
+
 // Globals, so that we remember settings from session to session
 wxPrintData &gPrintData()
 {
@@ -98,7 +100,7 @@ bool AudacityPrintout::OnPrintPage(int WXUNUSED(page))
       r.x = 0;
       r.y = y;
       r.width = width;
-      r.height = (int)(n->GetHeight() * scale);
+      r.height = (int)(TrackView::Get( *n ).GetHeight() * scale);
 
       TrackPanelDrawingContext context{
          *dc, {}, {}, &artist