#812 (ok 4.5) store export definitions for reuse

[Wolfgang Sprick]

I often need partial export/import of data. Let's
assume you run an online shop. So you need to add new
products based on your ERP from time to time and from
the online system you would want to export for example
orders to your ERP system.

I run this based on partial replication of table-sets
and the actual data tranformation from/to the ERP
system is based ob some application transferring data
from/to a local, partial mysql-mirror of the online
database.

So I would like to store the export-definition as some
kind of macro or job within phpMyAdmin to avoid
selecting the required tables for export again and
again.