Added new optional part for gadget structure: Jaws_Gadget_Event
[Jaws_Gadget_Installer]: Fixed uninstalling gadget error
[Jaws_Event]: Using new method for loading event
[Jaws_Gadget]: tail of Jaws_Gadget_Event part
[Layout]: Applying new changes in Jaws_Gadget_Event
[Menu]: Applying new changes in Jaws_Gadget_Event
[UrlMapper]: Applying new changes in Jaws_Gadget_Event