confirm empty voted options with default red

[rubo77]

If you vote for options the first time, you tend to just click on the dates, you are free (green) and don't click on the other dates.

Now when you save this, all dates, where you didn't click are grey.

instead, I would suggest to set all grey dates to red the first time, or at least, ask

"You didn't select all dates, do youwant to set the unselected dates to red?"

[opatut]

I think there are cases where "empty" fields are actually desired. So instead I guess the poll owner could select one of the choices to be the default, ie. preselected choice (in your case red). Or not. That way you can model that behaviour according to your needs.

However, I'm not going to implement that in this version of dudel. See CONTRIBUTING.md