Process feedback given by @Atlantic42.

- Rename rejection to "Interference Rejection" (abbreviated to "Interfer. Rej" like HDS).
- Add names Off/Low/Medium/High for interference rejection.
- Rename "Sea" to "Sea Clutter" (like HDS).
- Rename "Rain" to "Rain Clutter" (like HDS).
- Send commands to radar when a control is changed other than range.
- Continue to improve logging in verbose mode.
- Fix max value 10 for transparency.
- Hide Auto button if it is not to be used
More work on issue #25. Wire up guard zones.

Adds "Guard Zone 1" and "Guard Zone 2" buttons.
Also includes work to allow dual guard zones active at the same time.