Twenty Fifteen: correct number of menus used in comments

Props jeherve, see #30149



git-svn-id: https://develop.svn.wordpress.org/trunk@30568 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fifteen: docs correction and cleanup.

Props DrewAPicture, see #30149.



git-svn-id: https://develop.svn.wordpress.org/trunk@30569 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fifteen: make sure the 'says:' in comments is readable by a screen-reader.

Fixes #30479.



git-svn-id: https://develop.svn.wordpress.org/trunk@30570 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fifteen: update the .pot file.

Props iamtakashi, fixes #30433.



git-svn-id: https://develop.svn.wordpress.org/trunk@30571 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fifteen: docs correction.

Props rachelbaker, DrewAPicture, fixes #30456



git-svn-id: https://develop.svn.wordpress.org/trunk@30572 602fd350-edb4-49c9-b593-d223f7449a82