prepare to use HistorySwitchFolderManager

src/kmmainwidget.cpp

@@ -136,6 +136,7 @@
 
 #include <PimCommon/LogActivitiesManager>
 
+#include "historyswitchfoldermanager.h"
 #include "kmail_debug.h"
 // KF5 includes
 #include <KAcceleratorManager>
@@ -204,6 +205,7 @@ KMMainWidget::KMMainWidget(QWidget *parent, KXMLGUIClient *aGUIClient, KActionCo
     : QWidget(parent)
     , mLaunchExternalComponent(new KMLaunchExternalComponent(this, this))
     , mManageShowCollectionProperties(new ManageShowCollectionProperties(this, this))
+    , mHistorySwitchFolderManager(new HistorySwitchFolderManager(this))
 {
     // must be the first line of the constructor:
     mStartupDone = false;

src/kmmainwidget.h

@@ -91,6 +91,7 @@ class MailFilter;
 }
 class QStatusBar;
 class KMailPluginCheckBeforeDeletingManagerInterface;
+class HistorySwitchFolderManager;
 class KMAIL_EXPORT KMMainWidget : public QWidget
 {
     Q_OBJECT
@@ -656,5 +657,6 @@ private:
     KUserFeedback::NotificationPopup *mUserFeedBackNotificationPopup = nullptr;
 #endif
     KMailPluginCheckBeforeDeletingManagerInterface *mPluginCheckBeforeDeletingManagerInterface = nullptr;
+    HistorySwitchFolderManager *const mHistorySwitchFolderManager;
 };