Switch to side-by-side view

--- a/src/qtgui/spell_w.cpp
+++ b/src/qtgui/spell_w.cpp
@@ -35,6 +35,7 @@
 #include <qlistview.h>
 #else
 #include <QTableWidget>
+#include <QHeaderView>
 #endif
 
 #include "debuglog.h"