Sort the element Select List alphabetically

At the moment the order of the elements are not in a specific order. It is easier to read if the order of the elements is alphabetically.

app/helpers/alchemy/admin/elements_helper.rb

@@ -18,7 +18,7 @@ def elements_for_select(elements)
             Element.display_name_for(e["name"]),
             e["name"]
           ]
-        end
+        end.sort
       end
     end
   end