Switch Twitter oEmbed to SSL due to a Twitter API change. Ah, the open web.

props yurivictor, cojennin.
see #26844.

Built from https://develop.svn.wordpress.org/trunk@26967


git-svn-id: http://core.svn.wordpress.org/trunk@26846 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Realign the oEmbed providers. see #26844.

Built from https://develop.svn.wordpress.org/trunk@26968


git-svn-id: http://core.svn.wordpress.org/trunk@26847 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add a contrasting border to admin feature pointers.

props iammattthomas.
see #26689.

Built from https://develop.svn.wordpress.org/trunk@26970


git-svn-id: http://core.svn.wordpress.org/trunk@26849 1a063a9b-81f0-0310-95a4-ce76da25c4cd