id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
13881	Allowed attributes, allowed class sanitized by toggling source	Josh		"== Steps to reproduce ==

1. Allow class attribute on tables
2. Allow specific class
3. Add specified class on table element using source. Toggle source off, the class is sanitized and contains `cke_show_border`. Toggle source back on, class attribute is gone.

== Expected result ==
Class is applied and available to edit in the future. Source can be toggled without clearing allowed classes.

== Actual result ==
Allowed class is sanitized by toggling source

== Other details (browser, OS, CKEditor version, installed plugins) ==
All OS, all browsers. CKE 4.5.4. Plugins: table, tableresize,quicktable"	Bug	closed	Normal		UI : Source View		invalid		joshuajmark@…