cluster edit is now data change. Also ordering of clusters

src/message/simple_edits.py

@@ -1,5 +1,5 @@
 from message.message import Message
-from message.simple_messages import NoReset
+from message.simple_messages import NoReset, DataChgClickMessage
 import message.common_accessors as common_accessors
 from browser import document
 from model import Sense, Example
@@ -100,14 +100,14 @@ class EditEntryLabels(Message):
         model.entry.labels = labels
         
         
-class ExampleClusterEdit(NoReset):
+class ExampleClusterEdit(DataChgClickMessage):
     def update_model(self, model):
         example = self.get_arg(0, Example)
         cluster = self.get_arg(1, int)
         example.set_cluster(cluster)
         
         
-class ExampleClusterAdd(NoReset):
+class ExampleClusterAdd(DataChgClickMessage):
     def update_model(self, model):
         example = self.get_arg(0, Example)