Media: Ensure search box reflects actual search state.

* Also switches search box to use `<input type="search" />` to take advantage of browser UI to clear the field.

fixes #22315, see #21390.


git-svn-id: https://develop.svn.wordpress.org/trunk@22487 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/js/media-views.js

@@ -2086,7 +2086,7 @@
 		className: 'search',
 
 		attributes: {
-			type:        'text',
+			type:        'search',
 			placeholder: l10n.search
 		},
 
@@ -2136,7 +2136,7 @@
 					controller: this.controller,
 					model:      this.collection.props,
 					priority:   -40
-				}) );
+				}).render() );
 			}
 
 			this.attachments = new media.view.Attachments({