Dropdown with clearable=False can be cleared

Hi!

I am using a dcc.Dropdown with the clearing property to clearable=False. But it is still possible to clear its value with the delete key of my keyboard (same with the ‘Dropdown Clear’ example).

Is it possible to completely prevent a dropdown to be cleared ?

Thank you !

I also just stumbled across this bug. I opened an issue here: https://github.com/plotly/dash/issues/710