XARATINGS-4 : Allow admins to choose in which space the app will be active
- due to the fact that now the topmost configuration source is dynamic (Space.WebPreferences) we have to update the methods that retrieve configuration parameters to not depend on the context for retrieving the document for which the ratings are set/get but on the passed document name
- using the context to determine the document on which the ratings are set/get would not work when the context is anything other than the document that has the ratings associated to it
-- for example when calling from REST