Fix the rounds dropdown menu search on the all view.

[frjo]

• Add unpublished and not started filter to round admin list in wagtail.
• Add unpublished filter to rounds view.
• Fix headers in filter dropdown on rounds view.
• Fix unstyled pagination on rounds view.

Instead of tabs make open/closed look like this to make the filter in the dropdown work:

[frjo]

@wes-otf Does this look ok, to skip the tabs in rounds dropdown?

Found some bugs on the rounds view and added more filter options as well.