Fix BlackCore header includes

* Include only what is used
* Use forward declaration when possible
* Sorted includes

refs #598

src/blackcore/cookiemanager.h

@@ -12,14 +12,18 @@
 #ifndef BLACKCORE_COOKIEMANAGER_H
 #define BLACKCORE_COOKIEMANAGER_H
 
-#include "blackmisc/restricted.h"
 #include "blackcore/blackcoreexport.h"
+#include "blackmisc/restricted.h"
+
+#include <QList>
 #include <QNetworkCookieJar>
-#include <QNetworkCookie>
-#include <QNetworkRequest>
-#include <QNetworkAccessManager>
+#include <QObject>
 #include <QReadWriteLock>
 
+class QNetworkCookie;
+class QNetworkRequest;
+class QUrl;
+
 namespace BlackCore
 {
     class CApplication;