[FEATURE] Schema select for table list

**Is your feature request related to a problem? Please describe.** In Oracle E-Business suite a lot of tables are aggregated as views under the apps schema, however there are also lots of separate schemas with the actual tables. I would like to be able to select the schema to see different lists of tables and views **Describe the solution you'd like** I would like to be able to select the schemas in a list to see different lists of tables and views **Describe alternatives you've considered** Restarting dblab with lots of different configs