Switch to side-by-side view

--- a/src/qtgui/preview_w.cpp
+++ b/src/qtgui/preview_w.cpp
@@ -227,6 +227,7 @@
 	searchTextCMB->addItem(s);
     }
     searchTextCMB->setEditText("");
+    searchTextCMB->setCompleter(0);
 
     layout3->addWidget(searchTextCMB);