StartLiveData sometimes ignores Listener Properties

[MikeHart85]

PR #17926 makes it possible to pass Listener Properties as arguments when calling StartLiveData from Python.

However, under some circumstances, those arguments may be ignored and the properties are treated as if they have their default values. This only affect properties "pulled in" from the specific Listener being used, not properties that are part of StartLiveData itself.

This happens because Listener Properties are reset / reloaded whenever the Instrument, Listener or Connection property of StartLiveData changes. Instrument is treated as a special case, so that never causes this problem. But if Listener or Connection has been passed in as an argument, it's down to luck / Python dict order whether Listener Properties are reset before (OK) or after they are set (which destroys the value).