Research changes to QML scoping to make it more intuitive

I remember this has been talked about multiple times. I would like some more information added to this task.

Here is what I have gathered: Properties declared in parent components are made available in child components' scopes in an inconsistent way. In particular, properties of the root component are available to all (recursive) sub-components, but properties of intermediate components are not. context properties seemingly are available everywhere, even in completely unrelated, recursively instantiated components.

This situation makes property lookups brittle and expensive.