Media: Avoid repeated thumbnail resizing.

props avryl, wonderboymusic, azaozz.
fixes #27423.

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Media: Better padding for attachment items.

props avryl.
fixes #29085.

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git-svn-id: http://core.svn.wordpress.org/trunk@29462 1a063a9b-81f0-0310-95a4-ce76da25c4cd
MediaElement: Revert upstream commit b7f82b4 to restore the status quo for Chromium support.

fixes #29110.

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git-svn-id: http://core.svn.wordpress.org/trunk@29463 1a063a9b-81f0-0310-95a4-ce76da25c4cd
MediaElement: Bump version. see #29110.

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git-svn-id: http://core.svn.wordpress.org/trunk@29464 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Library: Fix media trash handling.

props ocean90, obenland.
fixes #29469.

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git-svn-id: http://core.svn.wordpress.org/trunk@29465 1a063a9b-81f0-0310-95a4-ce76da25c4cd