Make poll options use the full page width on desktop

[Steeven9]

It would be cool to have at least an option to allow the poll dates to take the full width of the page.

On large screens, it feels very silly having to scroll to see more options when you have all that empty space around.

I understand if it's a style choice, but then it should be an option to change it at least for self-hosted instances.

Currently, only about half of the options are shown here (13/21):