refactor modules/base.py to make View behave like Module

[jnsbck]

In the long term, it would be nice to make View behave more like Module without all of these properties essentially just indexing into View.pointer in some way. Imo most methods should be part of module if possible and only passed through to view, with view only showing what's in scope. While a method in module acts on the entire thing, in view it only acts on whatever is in view. This could be done by having a self.viewed_indexes / self.in_scope attr in Module, that decides what is set, where things are inserted etc. This would get rid of a lot of complexity and duplicate methods. For example would this make many hidden methods, like _record in Module obsolete. Additionally view can just be a property that returns View.nodes.

As suggested in #351

[jnsbck]

This was adressed with #447