start_ibex.bat: start server and then client

As a user I would like to not care about having to separately start the server and client, and just have one bat file in the start menu that does both.

### Acceptance Criteria
_What is the acceptance criteria?_
- [ ] a new bat is created for starting the server and client
- [ ] the upgrade scripts are modified to add this to the start menu on next deploy

### Extra Information
This may be as simple as adding a start_ibex.bat that calls the server (and then NOT in parallel as the initial stop_ibex_server call will kill any clients) and then starts the client.

If the client is not in \instrument\apps\client_e4\ then the bat prints out a message saying client not started as it doesnt exist in that location.