fix the issue of restoring focus(#37)

include/nana/gui/widgets/menubar.hpp

@@ -59,7 +59,7 @@ namespace nana
 			private:
 				void _m_move(bool to_left);
 				bool _m_popup_menu();
-				void _m_total_close();
+				void _m_total_close(bool try_restore);
 				bool _m_close_menu();
 				void _m_unload_menu_window();
 				std::size_t _m_item_by_pos(const ::nana::point&);
@@ -90,6 +90,11 @@ namespace nana
 
 					nana::menu *menu;
 					nana::point mouse_pos;
+
+					//The menu will restore the focus of taken window. But the restoring during
+					//key_press and key_release resets the focus to the taken window, it causes
+					//the taken window to receive a key_char which should be received by menubar.
+					bool delay_restore;
 				}state_;
 			};
 		}//end namespace menubar