Media: Rename the dialog to 'Add Media' from 'Insert Media' to match the button. see #21390.

git-svn-id: http://core.svn.wordpress.org/trunk@22895 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/media-editor.js

@@ -368,7 +368,7 @@
 
 			workflow = workflows[ id ] = wp.media( _.defaults( options || {}, {
 				frame:    'post',
-				title:    wp.media.view.l10n.insertMedia,
+				title:    wp.media.view.l10n.addMedia,
 				multiple: true
 			} ) );
 

wp-includes/media.php

@@ -1440,7 +1440,7 @@ function wp_enqueue_media( $args = array() ) {
 	$strings = array(
 		// Generic
 		'url'         => __( 'URL' ),
-		'insertMedia' => __( 'Insert Media' ),
+		'addMedia'    => __( 'Add Media' ),
 		'search'      => __( 'Search' ),
 		'select'      => __( 'Select' ),
 		'cancel'      => __( 'Cancel' ),