`wp.media.view.Button` should create `<button>`s, not `<a href="#">`s.

Props afercia.
See #32236.

Built from https://develop.svn.wordpress.org/trunk@32464


git-svn-id: http://core.svn.wordpress.org/trunk@32434 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/media-views.js

@@ -4211,9 +4211,9 @@ module.exports = ButtonGroup;
  * @augments Backbone.View
  */
 var Button = wp.media.View.extend({
-	tagName:    'a',
+	tagName:    'button',
 	className:  'media-button',
-	attributes: { href: '#' },
+	attributes: { type: 'button' },
 
 	events: {
 		'click': 'click'

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-32463';
+$wp_version = '4.3-alpha-32464';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.