Reduce includes

src/covermanager/albumcoverfetcher.cpp

@@ -22,11 +22,10 @@
 
 #include <QtGlobal>
 #include <QObject>
+#include <QNetworkAccessManager>
 #include <QTimer>
 #include <QString>
-#include <QRegExp>
 #include <QImage>
-#include <QNetworkAccessManager>
 
 #include "core/network.h"
 #include "core/song.h"

src/covermanager/albumcoverfetcher.h

@@ -23,20 +23,19 @@
 
 #include "config.h"
 
-
 #include <QtGlobal>
 #include <QObject>
-#include <QQueue>
-#include <QTimer>
 #include <QMetaType>
-#include <QHash>
-#include <QList>
 #include <QSet>
+#include <QList>
+#include <QHash>
+#include <QQueue>
 #include <QString>
 #include <QUrl>
 #include <QImage>
-#include <QNetworkAccessManager>
 
+class QTimer;
+class QNetworkAccessManager;
 class CoverProviders;
 class AlbumCoverFetcherSearch;
 struct CoverSearchStatistics;

src/covermanager/albumcovermanager.cpp

@@ -29,12 +29,9 @@
 #include <QWidget>
 #include <QItemSelectionModel>
 #include <QListWidgetItem>
-#include <QAction>
-#include <QActionGroup>
+#include <QNetworkAccessManager>
 #include <QFile>
-#include <QMenu>
 #include <QSet>
-#include <QTimer>
 #include <QVariant>
 #include <QString>
 #include <QStringBuilder>
@@ -43,7 +40,10 @@
 #include <QImage>
 #include <QPixmap>
 #include <QPainter>
-#include <QNetworkAccessManager>
+#include <QTimer>
+#include <QMenu>
+#include <QAction>
+#include <QActionGroup>
 #include <QShortcut>
 #include <QSplitter>
 #include <QStatusBar>
@@ -54,9 +54,10 @@
 #include <QPushButton>
 #include <QToolButton>
 #include <QKeySequence>
-#include <QtAlgorithms>
-#include <QtEvents>
 #include <QSettings>
+#include <QFlags>
+#include <QSize>
+#include <QtEvents>
 
 #include "core/application.h"
 #include "core/iconloader.h"

src/covermanager/albumcovermanager.h

@@ -23,30 +23,32 @@
 
 #include "config.h"
 
-
 #include <QtGlobal>
-#include <QObject>
-#include <QWidget>
 #include <QMainWindow>
+#include <QObject>
 #include <QAbstractItemModel>
-#include <QNetworkAccessManager>
 #include <QList>
 #include <QListWidgetItem>
 #include <QMap>
 #include <QString>
 #include <QImage>
 #include <QIcon>
-#include <QAction>
-#include <QMenu>
-#include <QMimeData>
-#include <QProgressBar>
-#include <QPushButton>
-#include <QtEvents>
 
 #include "core/song.h"
 #include "albumcoverloaderoptions.h"
 #include "coversearchstatistics.h"
 
+class QWidget;
+class QMimeData;
+class QNetworkAccessManager;
+class QMenu;
+class QAction;
+class QProgressBar;
+class QPushButton;
+class QEvent;
+class QCloseEvent;
+class QShowEvent;
+
 class Application;
 class CollectionBackend;
 class SongMimeData;

src/covermanager/albumcovermanagerlist.cpp

@@ -27,6 +27,7 @@
 #include <QListView>
 #include <QListWidget>
 #include <QListWidgetItem>
+#include <QStringList>
 #include <QMimeData>
 #include <QUrl>
 #include <QDropEvent>

src/covermanager/albumcovermanagerlist.h

@@ -24,14 +24,14 @@
 #include "config.h"
 
 #include <QObject>
-#include <QWidget>
 #include <QList>
 #include <QListWidget>
-#include <QListWidgetItem>
 #include <QString>
-#include <QMimeData>
-#include <QDropEvent>
 
+class QWidget;
+class QMimeData;
+class QListWidgetItem;
+class QDropEvent;
 class AlbumCoverManager;
 
 class AlbumCoverManagerList : public QListWidget {