Twitter feed doesn't load on "back"

1. Go to main page
2. Navigate to `/displays`
3. Navigate to main page
4. Hit the "back" button

Expected: everything renders correctly on /displays page

Actual result: /displays page loads w/o twitter feed

So the JS code rendering twitter widget isn't ran again. The solution is to put that code in `Deps.autorun` and depend on /displays

Start at the JavaScript that renders the Twitter widget for /displays and trace how navigation back reaches that page. Put that rendering in Deps.autorun with /displays as a dependency, then verify the reproduction steps and that the Twitter feed appears after using Back.

Written by the indexing model from the issue text.