In this commit we refactor the preview mechanism, and switch to
responsive views by default.
To create a preview, your view now has to implement the Preview trait.
This is very similar to SwiftUI's preview mechanism.
Signed-off-by: William Casarin <jb55@jb55.com>
pass just a note pointer to the note ui widget. We currently don't
support non-db notes but we can add support for that later.
Signed-off-by: William Casarin <jb55@jb55.com>
