Filter and Timeout Tooltips show null instead of undefined

Open a workflow and hover over the following icons in the diagram: You can use continuing-as-a-new-execution.sw.json and event-based-service-invocation.sw.yaml workflows to see the issue. Filter icon Timer icon Actual result If a property is not defined, "null" is shown next to the following properties: StateExecTimeout input Expected result If a property is not defined, "undefined" is shown next to the properties mentioned above.