Don't allow critical scripts to be deregistered on wp-login.php, just as we do in the rest of the admin.

props atimmer.
fixes #25017.

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git-svn-id: http://core.svn.wordpress.org/trunk@25364 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduce a img_caption_shortcode_width filter for controlling the inline style of the image caption shortcode.

props iandunn for the initial patch.
fixes #14380.

Built from https://develop.svn.wordpress.org/trunk@25444


git-svn-id: http://core.svn.wordpress.org/trunk@25365 1a063a9b-81f0-0310-95a4-ce76da25c4cd