Calibration plots when calibration envelope not given

If the calibration envelope is not given but the uncertainties rare given in the config file,

H1-spcal-amp-uncertainty=0.05
L1-spcal-amp-uncertainty=0.1
V1-spcal-amp-uncertainty=0.15
H1-spcal-phase-uncertainty=3
L1-spcal-phase-uncertainty=6
V1-spcal-phase-uncertainty=3

the calibration plot should still be produced.