Fix autoscale & group autoscale repaint problems

Author: jrobinso

src/main/java/org/broad/igv/track/TrackMenuUtils.java

@@ -918,7 +918,7 @@ private static JMenuItem getGroupAutoscaleItem(final Collection<Track> selectedT
             }
 
             PreferencesManager.getPreferences().setShowAttributeView(true);
-            IGV.getInstance().getMainPanel().invalidate();
+            IGV.getInstance().getMainPanel().revalidateTrackPanels();
             IGV.getInstance().repaint(selectedTracks);
 
         });

src/main/java/org/broad/igv/ui/IGV.java

@@ -2433,6 +2433,7 @@ private void repaint(final JComponent component, Collection<? extends Track> tra
 
             if (futures.size() == 0) {
                 UIUtilities.invokeOnEventThread(() -> {
+                    Autoscaler.autoscale(getAllTracks());
                     checkPanelLayouts();
                     component.repaint();
                 });