For Physical Web Server definitions split Host and Port configuration for test and passthrough behaviour

Currently in RIT Client configuring the physical definition the Host and Port configuration on the settings tab is used for both initiating test (bound to the operation and logical transport) and also for the default passthrough endpoint for stubs.

If the stub port is hardcoded using Port field on Server Socket Overrides section of the server tab and the RTCP proxy is not used and published to RTCP and started on RTVS it's not possible to use test configured for the same environment as they will be sent to the configured passthrough endpoint for stubs, instead of the hardcoded port and endpoint of the RTVS server.

Also when deploying multiple stubs with the same passthrough address (on settings tab) the proxy will fail to correctly configuring rules and/or will round robin between the started stubs if connecting through the proxy with this address as a RIT tests.

To test the stub directly we now always have to define another physical definition and/or environment to be able connect to/test the stub by configuring the rtvs server and configured port for the stub on the Settings tab.

Could an option be made to separately specify the passthrough hostname and port in the physical definition so we don't have to create to physical definitions/env to test the stub.