non draft messages can be saved now

Author: alejcas

O365/message.py

@@ -1106,8 +1106,6 @@ def save_draft(self, target_folder=OutlookWellKnowFolderNames.DRAFTS):
 
         if self.object_id:
             # update message. Attachments are NOT included nor saved.
-            if not self.__is_draft:
-                raise RuntimeError('Only draft messages can be updated')
             if not self._track_changes:
                 return True  # there's nothing to update
             url = self.build_url(