Switch to side-by-side view

--- a/src/qtgui/viewaction_w.cpp
+++ b/src/qtgui/viewaction_w.cpp
@@ -14,6 +14,7 @@
  *   Free Software Foundation, Inc.,
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
+#include "autoconfig.h"
 
 #include <stdio.h>