Use Qt provided forward declaration header

src/gui/fspathedit_p.h

@@ -32,15 +32,14 @@
 #include <QComboBox>
 #include <QFileIconProvider>
 #include <QLineEdit>
+#include <QtContainerFwd>
 #include <QValidator>
-#include <QVector>
 
 class QAction;
 class QCompleter;
 class QContextMenuEvent;
 class QFileSystemModel;
 class QKeyEvent;
-class QStringList;
 class QStringRef;
 
 namespace Private

src/gui/properties/downloadedpiecesbar.cpp

@@ -31,6 +31,7 @@
 #include <cmath>
 
 #include <QDebug>
+#include <QVector>
 
 namespace
 {

src/gui/properties/downloadedpiecesbar.h

@@ -30,7 +30,7 @@
 #define DOWNLOADEDPIECESBAR_H
 
 #include <QBitArray>
-#include <QVector>
+#include <QtContainerFwd>
 
 #include "piecesbar.h"
 

src/gui/properties/trackerlistwidget.cpp

@@ -42,6 +42,7 @@
 #include <QTableView>
 #include <QTreeWidgetItem>
 #include <QUrl>
+#include <QVector>
 
 #include "base/bittorrent/peerinfo.h"
 #include "base/bittorrent/session.h"

src/gui/properties/trackerlistwidget.h

@@ -30,7 +30,7 @@
 #define TRACKERLIST_H
 
 #include <QTreeWidget>
-#include <QVector>
+#include <QtContainerFwd>
 
 class PropertiesWidget;
 

src/gui/properties/trackersadditiondialog.h

@@ -30,9 +30,9 @@
 #define TRACKERSADDITION_H
 
 #include <QDialog>
+#include <QtContainerFwd>
 
 class QString;
-class QStringList;
 
 namespace BitTorrent
 {

src/gui/search/pluginselectdialog.h

@@ -31,11 +31,11 @@
 #define PLUGINSELECTDIALOG_H
 
 #include <QDialog>
+#include <QStringList>
 
 #include "base/search/searchpluginmanager.h"
 
 class QDropEvent;
-class QStringList;
 class QTreeWidgetItem;
 
 namespace Net

src/gui/tagfiltermodel.cpp

@@ -30,6 +30,8 @@
 
 #include <QDebug>
 #include <QIcon>
+#include <QSet>
+#include <QVector>
 
 #include "base/bittorrent/session.h"
 #include "base/bittorrent/torrenthandle.h"

src/gui/tagfiltermodel.h

@@ -30,8 +30,7 @@
 #define TAGFILTERMODEL_H
 
 #include <QAbstractListModel>
-#include <QSet>
-#include <QVector>
+#include <QtContainerFwd>
 
 class QModelIndex;
 

src/gui/trackerentriesdialog.cpp

@@ -31,6 +31,7 @@
 #include <algorithm>
 
 #include <QHash>
+#include <QVector>
 
 #include "base/bittorrent/trackerentry.h"
 #include "ui_trackerentriesdialog.h"

src/gui/trackerentriesdialog.h

@@ -29,7 +29,7 @@
 #pragma once
 
 #include <QDialog>
-#include <QVector>
+#include <QtContainerFwd>
 
 #include "base/settingvalue.h"