Adding other button(s) in title bar

Adding other button(s) in title bar


I was wondering if the minimize button and maximize/restore button
could be added with the option of displaying them or not for backward
compatibility?
I don't think you should handle the functionality of the click but to
be able to have them and set the callback function would be great. If
the callback function is not given then the click does nothing.
I'm not a good javascript programmer that's why i ask otherwise i
would do it myself. That's also why i think it would not be too
difficult to add. :-)
Is there a way of adding them at this point?
Thanks for considering