page action large size is 38 (not 35)

@jtremback: I just scaled these. If you want to re-scale an SVG
or something, feel free, but not sure it matters much.
remove execute bit on images
build out the page action states

Don't load the embed until the page is complete, but set the icon
as early as possible. Also, clean up the local storage when tabs
are closed.
move embed to app

use a named view instead of a route
correct BaseController reference
remove embed.js route mapping