Don't let anonymous users change interface language

Language selector is still opened by default

Change-Id: Iee7d83179e71b4546d8f3cd4f6fb053262ce05e2

resources/css/ext.uls.displaysettings.css

@@ -100,3 +100,11 @@ div.display-settings-block {
 	color: #555555;
 	font-size: 10pt;
 }
+
+.uls-display-settings-anon-label {
+	font-weight: bold;
+}
+
+#uls-display-settings-anon-log-in-cta {
+	font-size: 10pt;
+}