Enable Keyboard navigation after change has been submitted / abandoned / restored

Ensure that the keyboard navigation is enabled in
the change screen after a change has been
submitted, abandoned or restored.

When a change is submitted, abandoned or restored
the change screen is updated without reloading the
complete page. In this case the key navigation got
disabled.

Bug: issue 498
Change-Id: Ia9e2bc039584a60c540950610e65c9fb31c1a09f
Signed-off-by: Edwin Kempin <edwin.kempin@gmail.com>

gerrit-gwtui/src/main/java/com/google/gerrit/client/changes/ChangeScreen.java

@@ -115,7 +115,6 @@ public class ChangeScreen extends Screen {
     super.registerKeys();
     regNavigation = GlobalKey.add(this, keysNavigation);
     regAction = GlobalKey.add(this, keysAction);
-    patchSetsBlock.setRegisterKeys(true);
   }
 
   public void refresh() {
@@ -125,6 +124,11 @@ public class ChangeScreen extends Screen {
           protected void preDisplay(final ChangeDetail r) {
             display(r);
           }
+
+          @Override
+          protected void postDisplay() {
+            patchSetsBlock.setRegisterKeys(true);
+          }
         });
   }
 
@@ -217,7 +221,12 @@ public class ChangeScreen extends Screen {
     setPageTitle(titleBuf.toString());
   }
 
-  void display(final ChangeDetail detail) {
+  void update(final ChangeDetail detail) {
+    display(detail);
+    patchSetsBlock.setRegisterKeys(true);
+  }
+
+  private void display(final ChangeDetail detail) {
     displayTitle(detail.getChange().getKey(), detail.getChange().getSubject());
 
     if (starChange != null) {