modal-dialog

I always find it very handy if there is just a table with all available settings and their usage or meaning. Maybe this is something we can add to the readme. I also think this will provide a better overview to contributors which functions already exist.

The reason this popped in my head now, is that we have the setting FocusFirstElement. While it is true that that setting control whether or

hi:
I'm using your library,but i found the dismissible attribute does not behave correctly.
I see that you use ModalBarrier widget,when set the dismissible as true,it will call Navigator.pop,but i think it should disappear the mask instead of pop