The link to past events does go to those.

Refs #168

app/views/orgas/show.html.haml

@@ -86,5 +86,5 @@
       %em.fa.fa-backward
       = t '.past'
     %dd
-      = link_to tag_path @orga.name_as_tag do
+      = link_to tag_path(@orga.name_as_tag, anchor: 'past') do
         = t '.count', count: @events_past.count

app/views/tags/show.html.haml

@@ -28,7 +28,7 @@
         attributes: %w[href src width height style title name id]
 
 - if @events_past.any?
-  %h2
+  %h2#past
     %em.fa.fa-backward
     = t '.past'
     \-