Ticket #31161: 31161.patch

src/wp-includes/class-wp-editor.php

@@ -593 +593 @@
                                  * @param array  $buttons   Second-row list of buttons.
                                  * @param string $editor_id Unique editor identifier, e.g. 'content'.
                                  */
-                                $mce_buttons_2 = apply_filters( 'mce_buttons_2', array( 'formatselect', 'underline', 'alignjustify', 'forecolor', 'pastetext', 'removeformat', 'charmap', 'outdent', 'indent', 'undo', 'redo', 'wp_help' ), $editor_id );
+                                $mce_buttons_2 = apply_filters( 'mce_buttons_2', array( 'formatselect', 'underline', 'alignjustify', 'forecolor', 'pastetext', 'removeformat', 'charmap', 'outdent', 'indent', 'undo', 'redo' ), $editor_id );
+
+                                if ( ! wp_is_mobile() ) {
+                                        $mce_buttons_2[] = 'wp_help';
+                                }
 
                                 /**
                                  * Filter the third-row list of TinyMCE buttons (Visual tab).