#### User story
As an organizer, I want the event countries to be searchable, filterable, and displayed in the Collaboration List, so that anyone who is interested can easily learn about events happening in a specific country.
As a contributor, I want to know which events are happening in a country where I live or plan to travel to (or take interest in), so that I can decide if I want to join it or learn more about it.
#####Acceptance Criteria:
* Given that a user is on the Collaboration List (Special:AllEvents),
** And the event is** In person **or **Hybrid**
*** Then the user should be able to filter for event country
**** Country should be placed next to participation options
**** Country should only be selectable for in person or hybrid events
*** Label should be "Country"
** Do we need a feature flag?