[GB.FORM.STOCK] * NEW: Add a 128 pixel version of the 'delete' stock icon. [GB.GTK] * NEW: Message: Remove the message box native implementation. [GB.GTK3] * NEW: Message: Remove the message box native implementation. [GB.GUI.BASE] * NEW: Message: Implement the message boxes entirely in Gambas. [GB.QT4] * NEW: Message: Remove the message box native implementation. [GB.QT5] * NEW: Message: Remove the message box native implementation.