Reduce includes

src/internet/internetsearchsortmodel.h

@@ -21,9 +21,11 @@
 #ifndef INTERNETSEARCHSORTMODEL_H
 #define INTERNETSEARCHSORTMODEL_H
 
-#include <QObject>
 #include <QSortFilterProxyModel>
 
+class QObject;
+class QModelIndex;
+
 class InternetSearchSortModel : public QSortFilterProxyModel {
  public:
   InternetSearchSortModel(QObject *parent = nullptr);