Compress scripts/styles: 3.5-beta3-22810.

git-svn-id: http://core.svn.wordpress.org/trunk@22810 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Do SimplePie sanitization with wp_kses_post() rather than DOMDocument, which cannot be guaranteed to be available.

Overrides SimplePie_Sanitize with WP_SimplePie_Sanitize_KSES.

props markjaquith, rmccue.
see #21990.



git-svn-id: http://core.svn.wordpress.org/trunk@22811 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix various typos and omissions across a number of help tabs. props DrewAPicture, Ipstenu. see #22451.



git-svn-id: http://core.svn.wordpress.org/trunk@22812 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Updates to post.php help text for posts and pages, including a new section on inserting media. props DrewAPicture, Ipstenu. see #22451.



git-svn-id: http://core.svn.wordpress.org/trunk@22813 1a063a9b-81f0-0310-95a4-ce76da25c4cd
About page for WordPress 3.5, first pass. Not yet offered for translation. props lessbloat, johnbillion. see #22455.



git-svn-id: http://core.svn.wordpress.org/trunk@22814 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Two initial feature pointers for WordPress 3.5: plugin favorites and the media dialog. One offered for translation. props nacin, lessbloat, DrewAPicture. see #22454.



git-svn-id: http://core.svn.wordpress.org/trunk@22815 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media: Add global upload progress to the sidebar. see #21390.


git-svn-id: http://core.svn.wordpress.org/trunk@22816 1a063a9b-81f0-0310-95a4-ce76da25c4cd
WP_Image_Editor: the last stand.
 * Have wp_get_image_editor() rather than WP_Image_Editor::get_instance(). Having static factory methods would be less confusing if there weren't also static methods tied to individual editor implementations.
 * Lazy-load the WP_Image_Editor base class and editor implementations.
 * Have WP_Image_Editor_GD::supports_mime_type() actually check which types it supports.
 * Deprecate gd_edit_image_support() in favor of wp_image_editor_supports().

props DH-Shredder, scribu, markoheijnen. fixes #22356. see #6821.



git-svn-id: http://core.svn.wordpress.org/trunk@22817 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media: Display WordPress and plupload error messages whenever an upload fails. see #22243, #22186, #21390.


git-svn-id: http://core.svn.wordpress.org/trunk@22818 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media: Make the pre-upload-ui hooks share an element with the post-upload-ui hooks. see #22186, #21390.


git-svn-id: http://core.svn.wordpress.org/trunk@22819 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Compress scripts/styles: 3.5-beta3-22819.

git-svn-id: http://core.svn.wordpress.org/trunk@22820 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media: Make friends with media_upload_form. Adds notices for browser incompatibility, upload limits, maximum file size, and large file issues to the uploader. fixes #22243, see #22186, #21390.


git-svn-id: http://core.svn.wordpress.org/trunk@22821 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Uploader: Display a more specific error message when a file exceeds the file size limit. see #21390.


git-svn-id: http://core.svn.wordpress.org/trunk@22822 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media: Properly render any pre-existing upload errors in the uploader status. see #21390.


git-svn-id: http://core.svn.wordpress.org/trunk@22823 1a063a9b-81f0-0310-95a4-ce76da25c4cd