fixes #1139, fix other history page inconsistencies

app/views/artist_versions/index.html.erb

@@ -14,7 +14,9 @@
             <th>Updated by</th>
             <th>Active</th>
             <th>URLs</th>
-            <th></th>
+            <% if CurrentUser.is_member? %>
+              <th></th>
+            <% end %>
           </tr>
         </thead>
         <tbody>
@@ -34,11 +36,11 @@
                   <%= artist_version_urls_diff(artist_version) %>
                 </ul>
               </td>
-              <td>
-                <% if CurrentUser.is_member? %>
+              <% if CurrentUser.is_member? %>
+                <td>
                   <%= link_to "Revert", revert_artist_path(artist_version.artist_id, :version_id => artist_version.id), :method => :put, :confirm => "Are you sure you want to revert this artist?" %>
-                <% end %>
-              </td>
+                </td>
+              <% end %>
             </tr>
           <% end %>
         </tbody>