Parent modal unmounts when child modal is opened

[gabrielnvian]

Currently if a modal (modal A) is opened and its state is changed, when modal A opens another modal (modal B), modal A is unmounted.
This results some issues:

• The UI looks weird if modal B is smaller than modal A because you cannot see modal A under modal B.
• When modal B is closed and modal A is re-opened, its modified state is lost

Also it would be nice if there would be a way to update a modal (passing new props to the component) without closing and reopening it manually.