Switch to side-by-side view

--- a/src/qtgui/rclm_idx.cpp
+++ b/src/qtgui/rclm_idx.cpp
@@ -15,6 +15,8 @@
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 #include "autoconfig.h"
+
+#include <signal.h>
 
 #include <QMessageBox>
 #include <QTimer>