Relperm plot option for 1-SGAS on X axis

[EdmundStephens]

[2026.02.0] Please can you consider in the relperm viewer adding option to plot the gas saturation lines as function of water saturation on the X axis.

This would entail an additional check boxes to 'Plot 1-SGAS'. This would make two phase relperm and capillary plots more in line with normal practice.

Example water+gas relperm:

This is my mockup of this display:

[EdmundStephens]

... I just noticed that the KROW and KROG are already inverted in the current version. But for gas/water models, which includes CCS cases, it would be nice to have a 'Plot 1-GAS' option ... the other not needed.

[magnesj]

Enable this option when a Gas-Water system is detected.