| supportedDataMode | A list of the supported DataModes. |
| preferredDataMode | Preferred data mode to use given the current context when the DataMode switcher UI is set to Automatic. |
Updates the list of DataModes that the EditorWindow supports, and sets the preferred DataMode to use when the DataMode switcher UI is set to Automatic.
If the DataMode switcher UI is currently set to Automatic, the Editor window also changes to that preferred DataMode.