Add hooks to the wpeditimage tinymce plugin and to the image details portion of the media modal.

- Add wp.media.events which is intended to be a global media event bus.
- Add a post-render event to the ImageDetails view that third-party code can leverage to add subviews.
- Performance improvement for the initialization of the PostImage model.
- A bit more markup to the image details template to make it easier to add a view to the advanced options.
Props gcorne, fixes #27698
Built from https://develop.svn.wordpress.org/trunk@28095


git-svn-id: http://core.svn.wordpress.org/trunk@27926 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/css/media-views.css

@@ -1807,7 +1807,7 @@
 	left: 440px;
 }
 
-.advanced,
+.advanced-section,
 .link-settings {
 	margin-top: 10px;
 }