Add overlay/obfuscator

[MaxInMoon]

An overlay (like behind drawers) could add two benefices:

• handle the click on it to close the mfb or whatever
• add a custom background color with opacity (like 0.1)

I imagine this new props:

overlay: bool (default: false)

closeOnOverlayClick: bool (default: true)

overlayClick: func (optional)

overlayBackgroundColor: string (default: 'transparent')

overlayBackgroundOpacity: numb (default: 0')

---

How do you feel with this ideas?
Thanks