Modal is not scrollable on landscape view

I opened this app on Android portair view and then switched to landscape. When I open a `ListItem`, modal shows up, but `Go back` button is not visible and modal is not scrollable. Pressing back button shows an alert with message: `Modal has been closed`, but it is not. When I switched back to portrait view modal did not fit the screen vertically and overflowed horizontally, still having the same sizes as when opened, so I could not close modal window. I realize this is a sample app, but I guess `Modal` component may have critical bugs.

Start at the sample app screen that opens a ListItem and inspect how its Modal is configured. Reproduce the flow by switching between portrait and landscape, then check scrolling, the Go back button, and modal sizing after rotation. Done means the modal remains usable and closable in both orientations.

Written by the indexing model from the issue text.