Add option to import Vendors

Many vendors are the same for each customer. Would be nice to be able to have a supplier list and be able to import into another file. (This would be a feature for accountants/bookkeepers) as every file has the same vendors that need to be Keyed manually on each setup. Or have a database with Piston Ring, John Deere Multi, etc that can be added and then just customized.

This would also apply to Customers (Cargill, G3, etc)