Add animateOnMount to BottomSheetModal

[TNAJanssen]

As my issues get closed automatically (don't know why?!), here the request:

Feature Request
I would love to have animateOnMount on the modal to open it on rendering, as we need it to be outside the current view but also open on mount.

Why it is needed
I want to render a form within the BottomSheetModal, with passing data. However now if the props change that are passed to the component within the function rendering the child the form resets.

Possible implementation
Would love to have help, don't mind to make the changes but i don't have a clue yet to start.