Hide the photos/list tabs and related link on small screens. (#308)
Fix bug where pressing Esc to dismiss the working area was broken.
Hide the Need Help label on small screens. (#308)
Hide the Start Over label on small screens. (#308)
Streamline the breadcrumb and heading presentation on small screens.

Show the breadcrumb at top left, not nested next to the filters list
like on the full-screen page. Hide the main heading for now in
order to save space. (#308)
Make the questions list narrower on small screens. (#308)
Prevent footer-link line wrapping on small screens. (#308)
Make the questions list narrower on small screens. (#308)
Skip animation of results thumbnails on small screens. (#308)
Hide the photos-menu label on small-screen portrait view. (#308)
Show thumbnails in a single column for small-screen portrait view. (#308)
Hide the text note under Get More Questions on small screens. (#308)
Make the photos menu and the questions heading less prominent. (#308)
Switch back to a wider typeface for filters list on small screens. (#308)
Arrange buttons and reduce filter area height on small screens. (#308)
Format thumbnail photo frame areas for small screens. (#308)
Tighten the layout of the filter list area for small screens. (#308)
Adjust widths to make room for more images on small screens. (#308)
Move the intro overlay on small screens so it points to the questions. (#308)
Show and style the family and genus filters on small screens. (#308)