ChangeScreen2: Add missing action titles

Some of the action buttons on the ChangeScreen2 did not
have titles.  Add them.

Also make the titles consistent in usage of capitalisation.

Change-Id: Ibcf90fc45202a5081bfe4b348a05443eb1a6584b

gerrit-server/src/main/java/com/google/gerrit/server/change/Restore.java

@@ -133,6 +133,7 @@ public class Restore implements RestModifyView<ChangeResource, Input>,
   public UiAction.Description getDescription(ChangeResource resource) {
     return new UiAction.Description()
       .setLabel("Restore")
+      .setTitle("Restore the change")
       .setVisible(resource.getChange().getStatus() == Status.ABANDONED
           && resource.getControl().canRestore());
   }