Show offline participants on public scoreboard + filter

app/controllers/contests_controller.rb

@@ -92,6 +92,9 @@ class ContestsController < ApplicationController
       contestant.time_seconds
     ] }
     filter_contestants_per_category
+    if params.key?(:hide_offline) && params[:hide_offline] == "true"
+      @contestants = @contestants.select { |contestant| !contestant.offline.present? }
+    end
     @puzzles = @contest.puzzles.order(:id)
     @action_name = t("helpers.buttons.refresh")
     if params.key?(:category)
@@ -99,6 +102,7 @@ class ContestsController < ApplicationController
     else
       @action_path = "/public/#{@contest.friendly_id}"
     end
+    @space = " "
     render :scoreboard
   end