Ignorning extra key value in inspector_signal_detector_cvf.block.yml

[alphafox02]

When loading GNU Radio Companion 3.8 from terminal with GR-Inspector installed, I notice the following warning.

WARNING:gnuradio.grc.core.platform:inspector_signal_detector_cvf.block.yml block.parameters[7]: warn: Ignoring extra key 'value'

Seems harmless, but I couldn't help but to go look at the yml and see if I could figure out what was causing this. I noticed the template section seems maybe inconsistent with how the labels are, for example

set_fft_len(${fft_len}) is named like this but another one might be like this set_fft_len({$fft_len})

And it seems like min_bw and logfile isn't accounted for in the template. But then again, I might have no idea what I'm talking about. Just figured I'd bring this up and see what/if anything needed fixed.

Running latest available gr-inspector.