add bottom buttons

bottombuttongroup.h

@@ -0,0 +1,16 @@
+#ifndef BOTTOMBUTTONGROUP_H
+#define BOTTOMBUTTONGROUP_H
+
+#include <QAbstractButton>
+#include <QGroupBox>
+
+class BottomButtonGroup : public QGroupBox
+{
+    Q_OBJECT
+public:
+    explicit BottomButtonGroup(QWidget *parent = nullptr);
+
+    void addButton(QAbstractButton *button);
+};
+
+#endif // BOTTOMBUTTONGROUP_H