add label title

src/elements/element_label.erl

@@ -15,6 +15,7 @@ render_element(Record) ->
     {<<"id">>, Record#label.id},
     {<<"class">>, Record#label.class},
     {<<"style">>, Record#label.style},
+    {<<"title">>, Record#label.title},
     {<<"for">>, Record#label.for},
     {<<"onclick">>, Record#label.onclick} | Record#label.data_fields
   ]).