Default to list view when more than 10 date time options

[joepitt91]

⚠️ This issue respects the following points: ⚠️

• I agree to follow Nextcloud's Code of Conduct.

Describe the goal you'd like to achieve

As a poll participant, I want to be able to easily see the poll option on my screen, because it avoids options being missed if the vertical scroll bar which appears on grid view with 11+ options on a 1080p screen isn't spotted, also because most computer mouses don't have a vertical scroll wheel.

Describe possible solutions

1. Detect if a vertical scroll bar will occur and switch to list view dynamically - including if the user resizes the window after page load.
2. If there are more than 10 items in a date poll default to list view.
3. Allow the poll owner to set the default view for their poll.

Additional context

This seems to partly exist already, as mobile devices default to list view.

[joepitt91]

Partly related to #1136