Add hide_tool_bar config file setting

In preparation for toolbar implementation

src/win/win_ui.c

@@ -65,6 +65,7 @@ int		user_resize = 0;
 int		fixed_size_x = 0, fixed_size_y = 0;
 int		kbd_req_capture = 0;
 int		hide_status_bar = 0;
+int		hide_tool_bar = 0;
 int		dpi = 96;
 
 extern char	openfilestring[512];