Customize: For Header Image, ensure "Previously uploaded" and "Suggested" headings are hidden when lists are empty.

Fixes regression introduced with the addition of control notifications in [37476]. The container element for notifications is injected after the `.customize-control-title` element if the `.customize-control-notifications-container` element does not already exist in the control's template. Also adds missing margin between current image and uploaded images.

Props bradyvercher.
See #34893.
Fixes #38561.

Built from https://develop.svn.wordpress.org/trunk@39145


git-svn-id: http://core.svn.wordpress.org/trunk@39085 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/customize-controls-rtl.css

@@ -898,6 +898,7 @@ p.customize-section-description {
 	margin-bottom: 8px;
 }
 
+.customize-control-header .actions,
 .customize-control-header .uploaded {
 	margin-bottom: 18px;
 }

wp-admin/css/customize-controls.css

@@ -898,6 +898,7 @@ p.customize-section-description {
 	margin-bottom: 8px;
 }
 
+.customize-control-header .actions,
 .customize-control-header .uploaded {
 	margin-bottom: 18px;
 }

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

@@ -169,6 +169,7 @@ class WP_Customize_Header_Image_Control extends WP_Customize_Image_Control {
 			<?php if ( current_theme_supports( 'custom-header', 'video' ) ) {
 				echo '<span class="customize-control-title">' . $this->label . '</span>';
 			} ?>
+			<div class="customize-control-notifications-container"></div>
 			<p class="customizer-section-intro customize-control-description">
 				<?php
 				if ( current_theme_supports( 'custom-header', 'video' ) ) {

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta2-39144';
+$wp_version = '4.7-beta2-39145';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.