Actually hide "scroll to bottom" bar in posts view with unread posts.
Don't show extra menu items outside composition text view.

They would appear in the "To" or "Subject" text fields once the menu had
appeared in the main text view.
Don't refetch/rerender profile after showing PM screen.

Refetching and the subsequent rerendering would reset the contentOffset. In
effect the profile view was scrolled to the top after dismissing the compose PM
screen.
Let's show off our pretty work.