Thank you for this clarification. But it works only with clicking the list items, not with the checkboxes.
I would pay 20€. And maybe some other fellows as well. But maybe not. I dont know.
Generally speaking: I think it’s a major shortcoming in FOSS, that there are not mechanisms to collect money and fund developers - and this way find out which features really are important. Not being a strong market believer, nevertheless willingness to pay may a good indicator for importance.