Should gray out Input and Output split elements based on Efficiency

[hunteke]

TechInputSplit and TechOutputSplit assume the process has more than one input and output (i.e., multiple efficiency rows). If no processes in that technology class have more than one input or output, the TIS and TOS form elements of the technology block should not present the blue 'Add' button.

Perhaps a simple gray 'Need more than 1 efficiency' or 'requires >1 input/output' and mouseover text explaining to add additional efficiencies to at least one process in the technology class.