Widgets under the overlay are focusable

[pourqavam]

Hi If we use the overlay (renderOverlay: true), the underlying widgets are still focusable for example by pressing Tab on desktop platform.

The

FocusScope.of(context).canRequestFocus = false; // true
FocusScope.of(context).descendantsAreFocusable = false; // true

in the _SpeedDialState.toggleOverlay method can help but I'm not sure if it's the best and bug-free way.