Log Commercial Feed Failures

Non-200 results now treated as errors instead of trying to read their contents.
Remove local and global navigation from templates
Remove global nav burger icon
Remove old footer sections
Change dropdown icon name
Remove local nav
Refactor popup classes
remove js script
Merge branch 'master' into kc-fix-feed-read

Conflicts:
	commercial/app/model/commercial/AdsApi.scala
cleanup navigation helpers
Merge branch 'master' of github.com:guardian/frontend into navigation-remove-old-code
Restore navigation two level break point
add roles to navigation components
fix tests
Merge branch 'navigation-remove-old-code' of github.com:guardian/frontend into navigation-remove-old-code
Update Sentry API key
Hide facia containers when overlay is visible - fixes #5140
Merge remote-tracking branch 'origin/master' into navigation-remove-old-code
Merge pull request #5141 from guardian/navigation-remove-old-code

Navigation remove old code
Remove Responsive Nav switch