News: Copying of posts

templates/main.html

@@ -28,6 +28,7 @@
 	<h2>News</h2>
 
 	<table class=news>
+	<tr><td>2022-02-27<td>It is now possible to copy topics and their posts between courses.
 	<tr><td>2021-09-28<td>We changed structure of URLs to include semester code,
 		so that we can recycle course IDs.
 	<tr><td>2021-05-21<td>Teachers can now download results in CSV or JSON.