bug: opening a scope within a scope hides the original scope

[StummeJ]

Problem

Given you are in a scope and you need to open a new scope, when resolving a dependency in the original scope the get method will not find the dependency unless you specify the specific scope which has it (which you may not have access to)

Possible solution

When opening a new scope, the previous scope's scoped_services should be added, then overridden with any overlapping services