Fix: Flowchart does not load for JSON data inputs

[studioswong]

The flowchart does not load properly on first load with JSON data inputs, which is an issue that is uncovered / introduced since the removal of Kedro-UI webfonts .

This is due to the web-worker to render graph nodes not being able to be called and dispatched with initial state initialisation and only on further state changes - this affects Kedro-Viz when loading JSON data inputs as all the data are set within the state during initial state initialisation ( while running Kedro-Viz from a project refreshs the state with the REST API calls and hence does not face this problem.)

This ticket is to fix this to ensure the state updates on initial load.