Submit: Fix wrong conflict resolution

This amends commit 016642aa60.

The merge effectively reverted part of
4c58e1031f.

Change-Id: Icd441ce2a8f0fcd866d1b0e51e9d448581d51563

java/com/google/gerrit/server/restapi/change/Submit.java

@@ -293,7 +293,7 @@ public class Submit
   @Override
   public UiAction.Description getDescription(RevisionResource resource) {
     Change change = resource.getChange();
-    if (!change.getStatus().isOpen() || !resource.isCurrent()) {
+    if (!change.isNew() || !resource.isCurrent()) {
       return null; // submit not visible
     }