React-admin: Validation errorText on SelectInput is not displayed properly

[Natsuke]

Hi guys,

Like the title said, validation on an SelectInput is not displayed properly.

At this time this is how it looks like

With invastigation, the problem seems to came from SelectInput due to the custom menuStyle prop passed to SelectField

If we remove it, we retrieve the original usage of material-ui

As you can see, after remove, SelectInput looks the same, so I wonder if this property is still necessary !

[fzaninotto]

The property is necessary to display SelectInput correctly in the Filter form. But I'll find another way.