#83 Revamp dataBase access

[Tony Washer]

Prefix database names with MW_, and determine existing DBs from server, allowing selection of database from list.

DBBackups should be prefixed with MWDB_
XMLBackups with MWXML_,
Extracts with MWXtract_
Archives with MWArch_.

Backups should always be suffixed with YYYYMMDD

Provide mechanism to create/delete databases.
Allow auto-create of database from load of Backup if database does not currently exist.
Remember selected database as default for next session
Do not allow selected database to be deleted.
On creation of database populate with default data.