Editor: Allow popover attributes in editor content.

Add attributes to KSES so that it's possible to create popover interactions natively in the editor. Adds `popovertarget`, `popovertargetaction` and `aria-haspopup` to `button`; `popover` to `div`, `ul`, and adds `dialog` with the attributes `open`, `closedby`, and `popover`.

Props harshdeepgill, jonsurrell, joedolson, sukhendu2002, flixos90, joedolson.
Fixes #61959.
Built from https://develop.svn.wordpress.org/trunk@60884


git-svn-id: http://core.svn.wordpress.org/trunk@60220 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/kses.php

@@ -109,10 +109,13 @@ if ( ! CUSTOM_TAGS ) {
 		),
 		'br'         => array(),
 		'button'     => array(
-			'disabled' => true,
-			'name'     => true,
-			'type'     => true,
-			'value'    => true,
+			'disabled'            => true,
+			'name'                => true,
+			'type'                => true,
+			'value'               => true,
+			'popovertarget'       => true,
+			'popovertargetaction' => true,
+			'aria-haspopup'       => true,
 		),
 		'caption'    => array(
 			'align' => true,
@@ -145,7 +148,13 @@ if ( ! CUSTOM_TAGS ) {
 			'open'  => true,
 		),
 		'div'        => array(
-			'align' => true,
+			'align'   => true,
+			'popover' => true,
+		),
+		'dialog'     => array(
+			'closedby' => true,
+			'open'     => true,
+			'popover'  => true,
 		),
 		'dl'         => array(),
 		'dt'         => array(),
@@ -362,7 +371,9 @@ if ( ! CUSTOM_TAGS ) {
 		'tt'         => array(),
 		'u'          => array(),
 		'ul'         => array(
-			'type' => true,
+			'type'    => true,
+			'popover' => true,
+			'role'    => true,
 		),
 		'ol'         => array(
 			'start'    => true,

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.9-alpha-60816';
+$wp_version = '6.9-alpha-60884';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.