Add support for input signals on modals

[oscar-guerin]

Would it be possible to add support for input signals on modals ?

[lexasq]

@oscar-guerin signals are currently on our roadmap as an updaate to the library, but for now we're working on sorting out stuff that's piled up.

[frenzymind]

May you please say the approximate period when this feature will be completed ?

For now I have to use decorator @Input as workaround in mix with signals.