Hide the quick approve button when revision is not current

Bug: Issue 2362
Change-Id: I042d5379f6e6592c214c1a674d15617e4b439dc4
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/ChangeScreen2.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/ChangeScreen2.java
index 49f1922..a1a3ca9 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/ChangeScreen2.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/ChangeScreen2.java
@@ -803,11 +803,12 @@
       }
     }
     history.set(commentLinkProcessor, replyAction, changeId, info);
-    quickApprove.set(info, revision, replyAction);
 
     if (current) {
+      quickApprove.set(info, revision, replyAction);
       loadSubmitType(info.status(), canSubmit);
     } else {
+      quickApprove.setVisible(false);
       setVisible(strategy, false);
     }