improved css of language bar: added for a:visited

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@962 44740490-163a-0410-bde0-09ae8108e29a

www/resources/default.css

@@ -82,7 +82,7 @@ dt {
 	padding-left: 10px;
 	padding-right: 10px;
 }
-#languagebar a:link {
+#languagebar a:link, #languagebar a:visited {
 	text-decoration: none;
 	color: #777;
 	border-bottom: 1px dotted #ccc;