Task #4024: Première version calibration python
Adapt the code to have correct visual reprentation of SHCB results
When there are big holes in data the waveforms and spectra didn't match visually.
After lot of research and experiments, it seems that it is a bug of pcolormesh, so in a case of modes with big holes, we will prefer contourf.
The choice of the colorplot type is now modular
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