[Scopes] Synchronize scopes and filters (fix issue60)

3 main changes in this PR:
 1. Move `processScopes` to `commonAdmin` directory
 1. Synchronize filters and scopes (fix issue #60 )
 1. Fix multi-group scopes management (especially for generated views)

Demo repository updated to test this behavior.

PR ready to merge, waiting for your feedbacks

/cc @loostro 
I think checking if current filters match a scope is "too heavy" for something not really usefull.
The process you describe is the simplest. But imagine the user select a scope, change filters to create some that match another scope... does it make really sense to "notify" it represents one of the scopes?