qt5: Add option to get choice for export value
Allows me to get 0,1 and 0,25 from the hidden choice values from https://www.skatteetaten.no/globalassets/skjema/alltid/1-refusjonsskjema-skatteavtale-person so i can use them in JavaScript to calculate the 10% and the 25%
i.e. pdf has /Opt [ [ (0,1) (10%) ] ] /T (RE_drop)
and then the JavaScript does
event.value=AFMakeNumber\(getField\("Gross1"\).value\)*AFMakeNumber\(getField\("RE_drop"\).value\))