Display more participant info on contest dashboard

app/views/contests/show.html.slim

@@ -93,15 +93,25 @@
     table.table.table-striped.table-hover
       thead
         tr
+          th scope="col"
+            | Rank
           th scope="col"
             = t("activerecord.attributes.contestant.name")
+          th scope="col"
+            = t("activerecord.attributes.contestant.completions")
+          th scope="col"
+            = t("activerecord.attributes.contestant.display_time")
       tbody
-        - @contestants.each do |contestant|
+        - @contestants.each_with_index do |contestant, index|
           tr scope="row"
+            td
+              = index + 1
             td
               = contestant.name
+            td
+              = contestant.completions.length
+            td
+              = contestant.display_time
             td
               a.btn.btn-sm.btn-secondary href=edit_contest_contestant_path(@contest, contestant)
                 = t("helpers.buttons.open")
-              a.btn.btn-sm.btn-secondary.ms-3 href=new_contest_completion_path(@contest, contestant_id: contestant.id)
-                = t("helpers.buttons.add_completion")