Beautifier: Build with Qt 5

Amends 283673a5d9

Change-Id: I3ce759193a29d1c0dbc7d6ed7762503b3700b229
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/plugins/beautifier/abstractsettings.h

@@ -35,6 +35,8 @@
 #include <QStringList>
 #include <QVector>
 
+#include <memory>
+
 QT_BEGIN_NAMESPACE
 class QRegularExpression;
 class QVersionNumber;