Edited Feature: Consider including pre-generated mapping views for schema model in providers [1573]

I ran some experiments and found that pre-generated mapping views can improve start up time for things like the designer (and potentially other services that use the schema discovery model, such as a default DatabaseTableChecker implementation).

In the case of SQL Sever it only saves around half a second in my box, but if it is more significant for other databases this would be a good thing to encourage.