* Adds `createIframeStates()` to the `MediaFrame` view. It creates states and bindings for the `media_upload_tabs` output, and is included on `MediaFrame.Post` by default.
* Hijacks `tb_remove()` when the media modal is open to ensure the modal closes correctly.
* Adds a `chromeless` parameter to thickbox media tab URLs to render the UI without the old row of tabs.
see #22186, #21390.
git-svn-id: https://develop.svn.wordpress.org/trunk@22523 602fd350-edb4-49c9-b593-d223f7449a82