-- EgwPopupActionImplementation now only binds one Handler iff FindActionTarget is implemented and actionObjectInterface has attribute tree set. This is only the case for EgwDragDropShoelaceTree
window.egw with a reference to the main window in a popup, egw(_app, window) gives one with correct window context / translation in a popup (_app does not matter for translations, they are requested to be loaded from server-side)
classes are now uppercase and in their own files. lowercase classes are deprecated.
Interfaces are now actual interfaces that should be implemented instead of creating and returning an ai Object every time