Add option to hide CircularOptionPicker when empty

[madhusudhand]

What problem does this address?

ColorPicker component leaves an empty html element even when there are no options defined.

usage

<ColorPalette
    clearable={ false }
    enableAlpha={ enableAlpha }
    value={ color }
    onChange={ ( value ) => {} }
/>

What is your proposed solution?

Remove the elements from the DOM.

[mirka]

I'm not entirely sure about this. What specifically do we want to accomplish by removing the entire component div? And why couldn't a consumer just do options && <ColorPalette /> or something if they wanted that?