Update the TinyMCE initialization:

- Replace `wp_htmledit_pre()` and `wp_richedit_pre()` with `format_for_editor()`.
- Replace the `'htmledit_pre'` and `'richedit_pre'` filters with `'format_for_editor'`.
- Do not run the post content through `wpautop()` in PHP when the visual editor is default. Run the textarea content through the JS wpautop on initializing TinyMCE.
- Simplify both editors initialization.
- Improve setting of `wpActiveEditor` in Quicktags.
- Improve editor.js, use `tinymce.$` when possible.
See #32425.

git-svn-id: https://develop.svn.wordpress.org/trunk@32899 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/edit.css

@@ -425,6 +425,10 @@ td.plugin-title p {
 	visibility: visible !important;
 }
 
+.mce-fullscreen #wp-content-wrap .mce-tinymce .mce-wp-dfw {
+	display: none;
+}
+
 .post-php.mce-fullscreen #wpadminbar,
 .mce-fullscreen #wp-content-wrap .mce-wp-dfw {
 	display: none;