When a server is disabled/removed, all data from that server should be deleted

When a user disables or removes a server, 3 things should happen:

1.) provide a warning "Disabling or removing a server will cause any currently loaded data from that server to be removed from IGB".

2.) all data from that server should be removed/deleted.

3.) the Species list should have any unique-to-that-server species or genome versions removed from the Species/ Genome list list