msgbox: Create and handle a message box using PHP-Gtk

This class is meant to create and manage the input events of message box desktop window to wait for the user input using PHP-Gtk extension.

You can create a message box window specifying its title message, the icon to present with the message, the buttons with the text of the options that the user can choose, popup or modal window mode.

The class can open the message box window and return the identification of the button that was clicked by the user.