table builder: fix various incorrect css classes.

Change calling convention to explicitly indicate whether the attributes
are for the <th> element or the <td> element. Fixes various cases where
the two were mixed up.

* Fix .col-expand classes not being set correctly on the /post_versions,
  /pool_versions, and /notes pages.

* Fix .updater and .updated-at classes not being set correctly on the
  /forum_topics page.

* Fix the name param being ignored (noticeable in the post count field
  on the /tags page).

* Don't pass empty string when column has no name.

app/views/ip_addresses/_index.html.erb

@@ -16,7 +16,7 @@
   <% t.column "Date" do |ip| %>
     <%= time_ago_in_words_tagged ip.created_at %>
   <% end %>
-  <% t.column "" do |ip| %>
+  <% t.column do |ip| %>
     <%= link_to "IP info", "https://ipinfo.io/#{ip.ip_addr}" %>
   <% end %>
 <% end %>