Unknown error = undefined

Created by: balcirakpeter

When some of the operations fail the GUI pops up notification: "An operation failed. undefined"

To Reproduce I have created this by calling method getAttributes (Facility-Services configuration). One of the attributes was virtual but the underlying def attribute did not exist. Therefore the error was thrown.

Expected behavior I suppose that the "undefined" suffix is in the error message because the GUI could not determine the given exception from the backend. In such a case, it would be better to fill the notification just with "An operation failed." (without undefined).