refactor idea: streetmix-loader to create entity with street component

[kfarr]

Instead of having:

An entity can be created that is the "streetmix loader" entity, and then it will create a child that has the actual street

this street entity is "reactive" -- as a user you can change properties of the street component and it will update automatically, or at least destroy itself and recreate --> this was Alex's original idea to delete .street-parent

[Algorush]

That is, abandon the streetmix-loader component? I'll see what options there are to do this.