Request: ability to override auto-blink and auto-breathe tracking

[FomTarro]

In the interest of users needing to modify their parameter configuration as little as possible, I think it would be good to have an auto-breathe setting that only applies its oscillation in the event that no tracking data is being piped to the designated input parameter.

For example, my vts-heartrate plugin provides a parameter that can be used to control Breathing. But if the user modifies their model to have the custom parameter control their Breathing output, then when they are doing a normal stream without the plugin active, their model simply will not breathe.

Conversely, if they have auto-breathing set up for their Breathing output, that will override any tracking data to that output parameter.

As such, it would be nice if one could connect an input parameter to an output, enable auto-breathing to only kick in when no tracking data is provided, and never need to worry about altering the parameter configuration again.