Reduce includes

src/widgets/groupediconview.h

@@ -24,21 +24,20 @@
 #include "config.h"
 
 #include <QObject>
-#include <QWidget>
 #include <QListView>
 #include <QAbstractItemModel>
 #include <QAbstractItemView>
 #include <QItemSelectionModel>
 #include <QString>
 #include <QFont>
-#include <QPainter>
 #include <QPalette>
 #include <QPoint>
 #include <QRect>
 #include <QRegion>
 #include <QVector>
-#include <QtEvents>
 
+class QWidget;
+class QPainter;
 class QModelIndex;
 class QPaintEvent;
 class QResizeEvent;