Get rid of inline javascript

Get rid of inline javascript

This moves the javascript out to the main.js file like we already had
done for the main website.

This also removes attempts to use the selectmenu plugin for the
dropdown. This has not worked since the new design was put in place,
because the appropriate scripts were simply never loaded. As people
seems to be happy with that, stop *trying* to load them causing
javascript failures on every webpage.