Fixes a bug for case: telemetry values used in logical switches and they...

... have a duration and/or delay set.

Scenario:
```
L14   RSSIRx > 0   Duration (5s)
```

What happens in the old code:
* when powering up RX for the first time, L14 becomes ON for 5s - this is correct
* when removing power from RX and then powering back nothing happens - L14 stays OFF

This pull fixes that second case. The problem was the `return false` statement when telemetry was not streaming. This `return` resulted in skipped delay/duration processing code.