Not all output parameters can be plot in Bayes Fitting interface

[adriazalvarez]

Original reporter: Spencer

In Bayes Fitting interface, when switching backend from quasielastic to quickbayes, some of the output fit parameters are different or with different name. The output plot widget does not plot properly some of these parameters:

• In Stretch tab (quickbayes model) FWHM (sigma) does not plot if you click on Plot:

• In Quasi Tab prob and gamma don't seem to be working

• Check also if the Result plot is accessible from the output widget.

• Additionally, Spencer wants us to tune the default value of the EndSigma(FWHM) parameter from 0.1 to 0.2 in the property browser. (Is not directly related to the investigation of the plot widget but since it is such a small change it can be done as part of this issue)

Describe the bug

To Reproduce

Expected behavior

Output parameters are identified and correctly plot form the output plot widget.

Screenshots

Platform/Version (please complete the following information):

• OS: all
• OS Version:
• Mantid Version 6.15

Additional context