Designer should collect cost analysis statistics at import time, by default, for any data source that supports it

Performance can be dramatically improved if cost statistics are gathered at design time, which turns on cost-based optimizations at run time. However, the majority of Genentech users fail to remember to import this information, because it is not part of the standard import process.

When importing metadata from any data source, we should present users with the option to collect cost analysis statistics during import, so long as the data source supports it (or if MMX can calculate it synthetically).

Of course, we could inform users that cost analysis may take add some time to the import process.