Accessibility: Handle one more case of focus loss when switching view in the Media Views.

See #43169.


git-svn-id: https://develop.svn.wordpress.org/trunk@45531 602fd350-edb4-49c9-b593-d223f7449a82

src/js/media/views/frame/post.js

@@ -389,6 +389,8 @@ Post = Select.extend(/** @lends wp.media.view.MediaFrame.Post.prototype */{
 
 			click: function() {
 				this.controller.content.mode('browse');
+				// Move focus to the modal when jumping back from Edit Selection to Add Media view.
+				this.controller.modal.focusManager.focus();
 			}
 		});