In GUI > Simulation > Settings > Model evaluation, spell out "RT"

I find the text "RT computed for ..." rather obscure, and why is the "T" underlined?

Proposal: "Fresnel transmission and reflection coefficients computed for ..."

added GUI UX labels

changed milestone to %v22

assigned to @j.wuttke

mentioned in commit cd6bea28

mentioned in commit 40276d84

closed with merge request !2832 (merged)