So many changes and fixes

Trying to remember them all:

1. Modal windows changed to full screen
2. Buttons set to grey out when modal is activated
3. Got scrolling to work reasonably well, margin at bottom so you can
see all the text in mobile view
4. Still messing with relationship between onTouchMove disabling and
div scrolling. I think I have a script that works okay, but am trying
more.

Bugs:

1. Viewport still fucky on iOS