reimplementaion of fix for QColorDialog on macOS Sierra bug.

doesn't use destructor because destructor causes another crash.

YACReaderLibrary/empty_folder_widget.h

@@ -0,0 +1,36 @@
+#ifndef EMPTY_FOLDER_WIDGET_H
+#define EMPTY_FOLDER_WIDGET_H
+
+#include "empty_container_info.h"
+#include <QtWidgets>
+
+
+
+class EmptyFolderWidget : public EmptyContainerInfo
+{
+    Q_OBJECT
+public:
+    explicit EmptyFolderWidget(QWidget *parent = 0);
+    void setSubfolders(const QModelIndex & mi, const QStringList & foldersNames);
+signals:
+    void subfolderSelected(QModelIndex, int);
+
+    //Drops
+    void copyComicsToCurrentFolder(QList<QPair<QString, QString> >);
+    void moveComicsToCurrentFolder(QList<QPair<QString, QString> >);
+
+public slots:
+    void onItemClicked(const QModelIndex & mi);
+
+protected:
+    QListView * foldersView;
+    QModelIndex parent;
+    QStringListModel * subfoldersModel;
+    QString backgroundColor;
+
+    //Drop to import
+    void dragEnterEvent(QDragEnterEvent *event);
+    void dropEvent(QDropEvent *event);
+};
+
+#endif // EMPTY_FOLDER_WIDGET_H