Block Editor: Package updates for 5.8 beta 1.

This includes the following fixes:


Widgets Editor:
  - Load widgets.php https://github.com/WordPress/gutenberg/pull/32299
 - Fix Legacy Widget Preview https://github.com/WordPress/gutenberg/pull/32300
 - Fix error when saving empty Legacy Widget block https://github.com/WordPress/gutenberg/pull/32359

Widget blocks in the customizer: 
 - Fix deselection blocks when the inspector is open https://github.com/WordPress/gutenberg/pull/32361
 - Display wide widgets as popovers https://github.com/WordPress/gutenberg/pull/31736

Global Styles:
 - Align classNames generation between client and server https://github.com/WordPress/gutenberg/pull/32352
 - Group typography block supports https://github.com/WordPress/gutenberg/pull/32252 https://github.com/WordPress/gutenberg/pull/32444 https://github.com/WordPress/gutenberg/pull/32459
 - Make theme.json syntax errors more visible to the users https://github.com/WordPress/gutenberg/pull/32404


Template Editor:
  - Update the appearance of the template details https://github.com/WordPress/gutenberg/pull/32042
  - Fix layout definition https://github.com/WordPress/gutenberg/pull/32425
  - Fix grouping post content block https://github.com/WordPress/gutenberg/pull/32453

Miscellaneous:
 - Prevent saving when the post is locked https://github.com/WordPress/gutenberg/pull/32341
 - Fix allowed block patterns selector https://github.com/WordPress/gutenberg/pull/32376
 - Fix wrong results in the Post Author picker https://github.com/WordPress/gutenberg/pull/32344
 - Fix notices position in top toolbar mode https://github.com/WordPress/gutenberg/pull/32238
 - Allow non-latin characters in post slugs https://github.com/WordPress/gutenberg/pull/32232
 - Fix Random collapse of the color settings panel https://github.com/WordPress/gutenberg/pull/32388
 - Fix theme logo theme mode not being removed on theme removal https://github.com/WordPress/gutenberg/pull/32370
 - Fix block alignment styles in the editor https://github.com/WordPress/gutenberg/pull/32454
 - Fix some block toolbar overlaps https://github.com/WordPress/gutenberg/pull/32424
 - Fix content loss when switching list types https://github.com/WordPress/gutenberg/pull/32432


Performance:
 - Improve the performance of buttons block https://github.com/WordPress/gutenberg/pull/32356
 - Improve the performance of the container blocks https://github.com/WordPress/gutenberg/pull/32380

Props noisysocks, nosolosw, jorgefilipecosta.
See #52991.


git-svn-id: https://develop.svn.wordpress.org/trunk@51089 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-theme-json.php

@@ -655,7 +655,11 @@ class WP_Theme_JSON {
 			foreach ( $values as $value ) {
 				foreach ( $preset['classes'] as $class ) {
 					$stylesheet .= self::to_ruleset(
-						self::append_to_selector( $selector, '.has-' . $value['slug'] . '-' . $class['class_suffix'] ),
+						// We don't want to use kebabCase here,
+						// see https://github.com/WordPress/gutenberg/issues/32347
+						// However, we need to make sure the generated class
+						// doesn't contain spaces.
+						self::append_to_selector( $selector, '.has-' . preg_replace( '/\s+/', '-', $value['slug'] ) . '-' . $class['class_suffix'] ),
 						array(
 							array(
 								'name'  => $class['property_name'],