model: Update data of current user for realm_user update events.

This commit updates Model.initial_data when the realm_user: update
event occurs for the current user.

Author: mounilKshah

zulipterminal/model.py

@@ -1755,6 +1755,12 @@ def _handle_realm_user_event_update(self, event: Event) -> None:
         assert event["type"] == "realm_user"
         if event["op"] == "update":
             updated_details = event["person"]
+            # Role is not present under self.initial_data,
+            # but exists only under self.initial_data["realm_users"]
+            if "role" not in event["person"]:
+                # check if the event contains details of current user or some other user in the org
+                if updated_details["user_id"] == self.user_id:
+                    self.initial_data.update(updated_details)
             for realm_user in self.initial_data["realm_users"]:
                 if realm_user["user_id"] == updated_details["user_id"]:
                     realm_user.update(updated_details)