[css-ui-3] Prepare for REC publication

Author: frivoal

css-ui-3/Overview.bs

@@ -10,12 +10,13 @@ dt[style*="cursor"] * { cursor: inherit; }
 Title: CSS Basic User Interface Module Level 3 (CSS3 UI)
 ED: https://drafts.csswg.org/css-ui/
 TR: https://www.w3.org/TR/css3-ui/
-Previous Version: https://www.w3.org/TR/2017/CR-css-ui-3-20170302/
+Previous Version: https://www.w3.org/TR/2017/PR-css-ui-3-20171214/
 Shortname: css-ui
 Level: 3
 Group: csswg
-Status: ED
-Work Status: stable
+Status: REC
+Prepare for TR: true
+Work Status: completed
 Editor: Tantek Çelik, Mozilla https://www.mozilla.org/, tantek@cs.stanford.edu, http://tantek.com, w3cid 1464
 Editor: Florian Rivoal, On behalf of Bloomberg, http://florian.rivoal.net/, w3cid 43241
 Abstract: This specification describes user interface related