[css-cascade-4] Prep for WD

Author: fantasai

css-cascade-4/Overview.bs

@@ -2,13 +2,14 @@
 Title: CSS Cascading and Inheritance Level 4
 Shortname: css-cascade
 Level: 4
-Status: ED
+Status: WD
 Work Status: Testing
 Group: csswg
 ED: https://drafts.csswg.org/css-cascade/
 TR: https://www.w3.org/TR/css-cascade-4/
 Editor: Elika J. Etemad / fantasai, Invited Expert, http://fantasai.inkedblade.net/contact, w3cid 35400
 Editor: Tab Atkins Jr., Google, http://xanthir.com/contact/, w3cid 42199
+Previous Version: https://www.w3.org/TR/2018/CR-css-cascade-4-20180828/
 Previous Version: https://www.w3.org/TR/2016/CR-css-cascade-4-20160114/
 Previous Version: https://www.w3.org/TR/2015/WD-css-cascade-4-20150908/
 Previous Version: https://www.w3.org/TR/2015/WD-css-cascade-4-20150421/
@@ -1273,6 +1274,7 @@ Additions Since Level 2</h3>
 
 	<ul>
 		<li>The 'all' shorthand
+		<li>The ''initial'' keyword
 		<li>The ''unset'' keyword
 		<li>Incorporation of animations and transitions into the <a>cascade</a>.
 	</ul>