Editor expand: add border to the Text editor resize helper, helps calculating the height in some cases. Fixes #29225

git-svn-id: https://develop.svn.wordpress.org/trunk@29593 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/edit.css

@@ -386,6 +386,7 @@ td.plugin-title p {
 	visibility: hidden;
 	overflow: hidden;
 	max-width: 100%;
+	border: 1px solid transparent;
 }
 
 .wp-fullscreen-wrap #content-textarea-clone {

src/wp-admin/js/editor-expand.js

@@ -276,6 +276,10 @@ jQuery( document ).ready( function($) {
 			getHeights();
 		}
 
+		if ( ! visual && type === 'resize' ) {
+			textEditorResize();
+		}
+
 		if ( visual ) {
 			$top = $visualTop;
 			$editor = $visualEditor;