Default SCHEMA per connection

[COBOL-Erik]

Description of the feature or enhancement

I would like to be able to set default schemas on the connection level. I know you can set schema with the right-click options, but the default differs between connections, and I’d like to set it only once.

This request is somewhat similar to #60, but we really only have one default per connection.

[b-tsao]

You can add a default schema on the connection level by specifying the currentSchema connection property when add/editing a connection.

ref: https://ibm.github.io/db2forzosdeveloperextension-about/docs/the-basics/creating-a-database-connection

For additonal properties see JDBC properties:
https://www.ibm.com/docs/en/db2-for-zos/13?topic=pdsdjs-common-data-server-driver-jdbc-sqlj-properties-all-database-products