Cleanup: Remove remaining links to JQM CSS

Not needed now that it is inlined with the theme CSS
Merge pull request #1338 from pjackson28/master

Added svgfix to the list of conditions for changing the image file path
Merge pull request #1336 from nschonni/remove-jquery-css-demo-link

Cleanup: Remove remaining links to JQM CSS
Now hiding second skip link when in mobile view since neither the secondary navigation or footer are reachable by skip link in that view.
Removed file that shouldn't be part of the pull request.