`vis.register_modifier` open questions

[PythonFZ]

• [ ] what happens if the Python kernel closes
• [ ] what happens if the page is reloaded (modifiers for given token should remain, if no token all modifiers should remain)
• [ ] vis.register(cls, run_kwargs: dict) for passing e.g. ML models to the cls.run as kwargs
• [ ] remove method from each entry, including enums like in moldiff - if we have to modify them anyway, can't we add the method automatically?
• [ ] pass vis object to the modifers run method - or have self.vis ?
• [ ] using register_modifier twice, will remove the first one.
• [ ] non-default modifiers should be able to have the same name.
• [ ] What about selection / analysis
• [ ] with default=True the modifier still uses self.<attribute> which will not be correct!
• [ ] properly allow to register a modifier without a token (might already be fine the way it is.)