SelectedOption in StepUiState does not get updated

[vtaneka]

scenario:
Dropdown is dependent on the dropzone.
1.Drop a file on the DropZone and dropdown will be populated with options
2.select one option, this will update the "selectedOption" in the StepUIState
3. Now remove the file from the dropzone

Issue: The Dropdown's list is emptied in the StepUIState but the "SelectedOption" does not get emptied/updated.