add min-gap for acqmon-processing
Created by: jorana
What is the problem / what does the code in this PR do
The acqmon processing used the find_peak_groups
and used a max_gap_threshold
for that. However the function assumes it's a minimum gap threshold leading to finding improperly defined peak-durations. Therefore, we add an extra option to the plugin. This value should be at least 1 ns otherwise the extensions don’t work.
@AlexElykov sorry for the PEP8-stuff pycharm sometimes is a little overenthusiastic.