Fix for Move to Next/Previous Label commands

Problem was that when these commands were used when playback was stopped, the tracks did not automatically scroll to make sure that the label that had been moved to was visible.

Fix: call TrackPanel::ScrollIntoView().

src/Menus.cpp

@@ -2726,6 +2726,7 @@ void AudacityProject::OnMoveToLabel(bool next)
          }
          else {
             GetViewInfo().selectedRegion = label->selectedRegion;
+            mTrackPanel->ScrollIntoView(GetViewInfo().selectedRegion.t0());
             RedrawProject();
          }