Setting Roundcube session timeout to 1 hour.

Default is 10 minutes.

roles/ispmail-webmail/templates/roundcube-config.inc.php.j2

@@ -80,3 +80,7 @@ $config['plugins'] = array(
 
 // skin name: folder from skins/
 $config['skin'] = 'larry';
+
+// Session lifetime in minutes
+$config['session_lifetime'] = 60;
+