Switch to side-by-side view

--- a/Allura/allura/model/project.py
+++ b/Allura/allura/model/project.py
@@ -240,7 +240,8 @@
             for roleid in p.acl[name]:
                 roles.append(roleid)
         for roleid in self.acl[name]:
-            roles.append(roleid)
+            if roleid not in roles:
+                roles.append(roleid)
         return roles
 
     def sitemap(self):