fixing css calls
use a combination of content and font-family to get breakpoint out of the css from js
Revert "use a combination of content and font-family to get breakpoint out of the css from js"

This reverts commit 7efef98a1ce436e67edc216f54ded6b00b1aa3d9.
default to desktop
default to desktop
Revert "Revert "use a combination of content and font-family to get breakpoint out of the css from js""

This reverts commit baaae81aedcec65decdea0e2ce61518c4b6b6c33.

Conflicts:
	common/app/assets/javascripts/utils/detect.js
fixed tests
append font to head
Merge pull request #5624 from guardian/non-modern-commercial-fixes

More fixes to make commercial X-browser