Called when the module is added to the editor. The module should
add any menu items it requires to the menus in the menu bar.
Use getMenu below to locate the correct menu in which to add content
Activate/Deactive this module.
When a module is activated this method will create, display and
arrange all the windows. It will also add the appropriate GUI
listeners.
When deactived the windows are hidden and possibly destroyed and all
listeners (for menu events etc) are detached