Button needs to filter out special props

[idmontie]

Props like loading are being passed to the node that is rendered by Button, causing an error/warning in the console.

index.js:1452 Warning: Received `false` for a non-boolean attribute `loading`.

If you want to write it to the DOM, pass a string instead: loading="false" or loading={value.toString()}.

If you used to conditionally omit it with loading={condition && value}, pass loading={condition ? value : undefined} instead.