Add what's new dialog

custom_widgets/whats_new_dialog.h

@@ -0,0 +1,17 @@
+#ifndef WHATSNEWDIALOG_H
+#define WHATSNEWDIALOG_H
+
+#include "rounded_corners_dialog.h"
+#include <QObject>
+
+namespace YACReader {
+
+class WhatsNewDialog : public RoundedCornersDialog
+{
+    Q_OBJECT
+public:
+    explicit WhatsNewDialog(QWidget *parent = nullptr);
+};
+}
+
+#endif // WHATSNEWDIALOG_H