Customizer: make "Current header" clickable in the same way that "Background Image" is - will open the media modal.

Props umesh.nevase.
Fixes #33586.

Built from https://develop.svn.wordpress.org/trunk@34702


git-svn-id: http://core.svn.wordpress.org/trunk@34666 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-customize-control.php

@@ -1299,16 +1299,18 @@ class WP_Customize_Header_Image_Control extends WP_Customize_Image_Control {
 				?>
 			</p>
 			<div class="current">
+				<label for="header_image-button">
 					<span class="customize-control-title">
 						<?php _e( 'Current header' ); ?>
 					</span>
+				</label>
 				<div class="container">
 				</div>				
 			</div>
 			<div class="actions">
 				<?php if ( current_user_can( 'upload_files' ) ): ?>
 				<button type="button"<?php echo $visibility; ?> class="button remove" aria-label="<?php esc_attr_e( 'Hide header image' ); ?>"><?php _e( 'Hide image' ); ?></button>
-				<button type="button" class="button new" aria-label="<?php esc_attr_e( 'Add new header image' ); ?>"><?php _e( 'Add new image' ); ?></button>
+				<button type="button" class="button new" id="header_image-button"  aria-label="<?php esc_attr_e( 'Add new header image' ); ?>"><?php _e( 'Add new image' ); ?></button>
 				<div style="clear:both"></div>
 				<?php endif; ?>
 			</div>

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34701';
+$wp_version = '4.4-alpha-34702';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.