[Yanel-usage] Look-In property for resource creator resource type implememted

[Michael Wechner]

Hi

The resource creator resource type shows a sitetree to select from, 
whereas one can now configure the initial "look-in".

As an example please see

src/realms/from-scratch-realm-template/res-configs/create-new-page.html.yanel-rc

Cheers

Michi