Media: Add lazy-loading support to block-based widgets.

This changeset adds the `wp_filter_content_tags()` function as a filter to `widget_block_content`.

Props spacedmonkey, walbo, daisyo.
Fixes #53463, #53464.

Built from https://develop.svn.wordpress.org/trunk@51207


git-svn-id: http://core.svn.wordpress.org/trunk@50816 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/default-filters.php

@@ -215,6 +215,7 @@ add_filter( 'widget_text_content', 'wp_replace_insecure_home_url' );
 add_filter( 'widget_text_content', 'do_shortcode', 11 ); // Runs after wpautop(); note that $post global will be null when shortcodes run.
 
 add_filter( 'widget_block_content', 'do_blocks', 9 );
+add_filter( 'widget_block_content', 'wp_filter_content_tags' );
 add_filter( 'widget_block_content', 'do_shortcode', 11 );
 
 add_filter( 'block_type_metadata', 'wp_migrate_old_typography_shape' );

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-beta2-51206';
+$wp_version = '5.8-beta2-51207';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.