Add a css class to hide content when printing. #5508

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3787 e93f8b46-1217-0410-a6f0-8f06a7374b81

public/stylesheets/application.css

@@ -911,4 +911,5 @@ h2 img { vertical-align:middle; }
   #main { background: #fff; }
   #content { width: 99%; margin: 0; padding: 0; border: 0; background: #fff; overflow: visible !important;}
 	#wiki_add_attachment { display:none; }
+  .hide-when-print { display: none; }
 }