Add `wp.media.view.MediaFrame.MediaDetails`, which `wp.media.view.MediaFrame.AudioDetails` and `media.view.MediaFrame.VideoDetails` extend. The subclasses subsequently only need to set `createStates()` and `bindHandlers()`, as well as any missing toolbar views.

See #27016.


Built from https://develop.svn.wordpress.org/trunk@27479


git-svn-id: http://core.svn.wordpress.org/trunk@27323 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Since audio and video shortcodes don't point at actual attachments, don't persist the library's selection. Move the media instructions in the block that scrolls.

See #27016.


Built from https://develop.svn.wordpress.org/trunk@27480


git-svn-id: http://core.svn.wordpress.org/trunk@27324 1a063a9b-81f0-0310-95a4-ce76da25c4cd