Little ugly, but we can get rid of QString as well.

src/frontends/qt/Toolbars.cpp

@@ -16,6 +16,8 @@
 #include "Format.h"
 #include "FuncRequest.h"
 #include "LyXAction.h"
+
+#include <QString>
 #include "qt_helpers.h"
 
 #include "support/debug.h"

src/frontends/qt/qt_helpers.cpp

@@ -12,6 +12,7 @@
 
 #include <config.h>
 
+#include <QString>
 #include "qt_helpers.h"
 
 #include "Buffer.h"

src/frontends/qt/qt_helpers.h

@@ -21,8 +21,6 @@
 
 #include <list>
 
-#include <QString>
-
 class QComboBox;
 class QLineEdit;
 class QString;