The server has now 2 notification streams

* A new one for controller related events (compute, appliance templates etc.)
* The existing one for project related events (links, nodes etc.)

gns3server/controller/snapshot.py

@@ -124,7 +124,7 @@ class Snapshot:
         except (OSError, PermissionError) as e:
             raise aiohttp.web.HTTPConflict(text=str(e))
         yield from project.open()
-        self._project.controller.notification.emit("snapshot.restored", self.__json__())
+        self._project.controller.notification.project_emit("snapshot.restored", self.__json__())
         return self._project
 
     def __json__(self):