refactor interface

view_user_info.h

@@ -2,6 +2,7 @@
 #define VIEW_USER_INFO_H
 
 #include <gtkmm/box.h>
+#include <gtkmm/buttonbox.h>
 #include <gtkmm/treeview.h>
 #include <gtkmm/liststore.h>
 
@@ -21,6 +22,8 @@ public:
 
   ModelColumns m_Columns;
   Glib::RefPtr<Gtk::ListStore> m_refTreeModel;
+
+  Gtk::ButtonBox b_box;
   Gtk::Button b_add_user;
   Gtk::Button b_dell_user;