make services links thinner
move soulmates link under more on tablet
make more menu narrower on tablet
Merge remote-tracking branch 'origin/master' into services-links-styling

Conflicts:
	common/app/assets/stylesheets/base/_helpers.scss
	common/app/assets/stylesheets/layout/_header.scss
Merge pull request #5110 from guardian/services-links-styling

Services navigation layout for tablet