Participation panel revamp and fixes

Apollo is a pain in the ass with pagination & filters, so this removes
the tabs system and uses a <select> to filter instead

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/graphql/actor.ts

@@ -212,6 +212,7 @@ export const LOGGED_USER_PARTICIPATIONS = gql`
               }
             }
             participantStats {
+              going
               notApproved
               participant
             }