Console warning when using alwaysOn SelectInput in Filter component

[MiMo42]

What you were expecting:
No console warnings

What happened instead:
Console warning:
Warning: React does not recognize the alwaysOn prop on a DOM element.
It hit me after set alwaysOn prop on a SelectInput within a Filter component.

Steps to reproduce:

• Open modified ra simple example at https://codesandbox.io/s/simple-kld3t
• Switch to Comments
• See Warning in console

Related code:
https://codesandbox.io/s/simple-kld3t

Other information:
As in #4133 alwaysOn prop is not sanitized.

Environment

• React-admin version: 3.0.4
• React version: 16.12.0
• Browser: Chrome

[fzaninotto]

Reproduced and confirmed, thanks for the report.

[marina9568]

The same issue with SelectArrayInput.