Update model.v.5.0.txt

[robertodawid]

The original supersets: set MODExTECHNOLOGYperEMISSION{e in EMISSION} within MODE_OF_OPERATION cross TECHNOLOGY; and
set MODExTECHNOLOGYperEMISSIONChange{e in EMISSION} within MODE_OF_OPERATION cross TECHNOLOGY; generates empty supersets no value for MODExTECHNOLOGYperEMISSIONChange[CO2eq]

In the original formulation, the supersets function correctly only when both EmissionToActivityChangeRatio andEmissionActivityRatioare defined for the same emission (e.g., CO2eq). If EmissionToActivityChangeRatio is instead defined for a different emission (e.g., CO2_land) that does not appear in EmissionActivityRatio, an error will occur due to an empty superset—specifically: "empty supersets no value."

[VedranKapor]

model.v.5.0.txt is integral part of MUIO interface. Supersets are generated within UI as part of preprocessing data file, so model file should not be changed. After inspection, I confirm supersets are created correctly.