Add close button at top of project list popup

The list of projects in the project list popup can be very long and
then the close button is inconveniently far down the page. Add a
second close button at the top of the popup.

Change-Id: Ib33cd00db31a561f3932a02ec1a8556d256845ed
Signed-off-by: Edwin Kempin <ekempin@google.com>

gerrit-gwtui/src/main/java/com/google/gerrit/client/ui/ProjectListPopup.java

@@ -43,7 +43,8 @@ public class ProjectListPopup {
   private HorizontalPanel filterPanel;
   private String match;
   private Query query;
-  private Button close;
+  private Button closeTop;
+  private Button closeBottom;
   private ScrollPanel sp;
   private PopupPanel.PositionCallback popupPosition;
   private int preferredTop;
@@ -55,10 +56,11 @@ public class ProjectListPopup {
     createWidgets(popupText, currentPageLink);
     final FlowPanel pfp = new FlowPanel();
     pfp.add(filterPanel);
+    pfp.add(closeTop);
     sp = new ScrollPanel(projectsTab);
     sp.setSize("100%", "100%");
     pfp.add(sp);
-    pfp.add(close);
+    pfp.add(closeBottom);
     popup.setWidget(pfp);
     popup.setHeight("100%");
     popupPosition = getPositionCallback();
@@ -147,17 +149,23 @@ public class ProjectListPopup {
     };
     projectsTab.setSavePointerId(currentPageLink);
 
-    close = new Button(Util.C.projectsClose());
+    closeTop = createCloseButton();
+    closeBottom = createCloseButton();
+
+    popup = new DialogBox();
+    popup.setModal(false);
+    popup.setText(popupText);
+  }
+
+  private Button createCloseButton() {
+    Button close = new Button(Util.C.projectsClose());
     close.addClickHandler(new ClickHandler() {
       @Override
       public void onClick(final ClickEvent event) {
         closePopup();
       }
     });
-
-    popup = new DialogBox();
-    popup.setModal(false);
-    popup.setText(popupText);
+    return close;
   }
 
   public void displayPopup() {