Twenty Fourteen: fix unreachable links when the content area is shorter than the sidebar in smaller viewpoints. Props celloexpressions, see #26782.

git-svn-id: https://develop.svn.wordpress.org/trunk@27121 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fourteen: translate `featured` tag slug used to link to specific tags in Posts editor. See #26526.

git-svn-id: https://develop.svn.wordpress.org/trunk@27122 602fd350-edb4-49c9-b593-d223f7449a82