Media modal: use the same classes to hide the "or" that is above the "Select files" button when no drag-drop support. See #28851.
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Language chooser: Adjust continue button alignment.

Built from https://develop.svn.wordpress.org/trunk@29374


git-svn-id: http://core.svn.wordpress.org/trunk@29152 1a063a9b-81f0-0310-95a4-ce76da25c4cd