On project creation allow choosing parent from popup.

In the create project UI a user can now browse all
projects and select one as parent for the new project.

Change-Id: I2be514c60d70e895607d93f6671c3698d1b7e6de
Signed-off-by: Bruce Zu <bruce.zu@sonymobile.com>

gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/AdminConstants.java

@@ -48,6 +48,8 @@ public interface AdminConstants extends Constants {
   String suggestedGroupLabel();
   String parentSuggestions();
 
+  String buttonBrowseProjects();
+  String projects();
   String headingGroupUUID();
   String headingOwner();
   String headingDescription();