Show / hide work package relations table after AJAX updates

Fixes integration tests

app/assets/stylesheets/default/main.css.erb

@@ -43,6 +43,7 @@ table.list td.buttons a { padding-right: 0.6em; }
 table.list caption { text-align: left; padding: 0.5em 0.5em 0.5em 0; }
 
 table.work-package-data-table { margin-top: 5px; }
+table.work-package-data-table.hidden { display: none; }
 table.work-package-data-table td { text-align: left; padding: 3px 6px; }
 
 tr.project td.name a { white-space: nowrap; }

app/views/work_package_relations/create.js.erb

@@ -30,6 +30,7 @@ See doc/COPYRIGHT.rdoc for more details.
 jQuery('#relations #errorExplanation').remove();
 
 <% if relation.errors.empty? %>
+  jQuery('#work-package-relations-table').removeClass('hidden');
   jQuery('#relations tbody').append("<%= escape_javascript(render :partial => 'work_packages/relation', :locals => { :relation => relation, :work_package => work_package }) %>");
 
   jQuery('#relation_to_id').val('');

app/views/work_package_relations/destroy.js.erb

@@ -28,3 +28,7 @@ See doc/COPYRIGHT.rdoc for more details.
 ++#%>
 
 jQuery('#work_package_relation_<%= @relation.id %>').remove();
+
+var relationsTable = jQuery('#work-package-relations-table');
+if (relationsTable.find('tbody tr').length === 0) relationsTable.addClass('hidden');
+

app/views/work_packages/_relations.html.erb

@@ -34,24 +34,22 @@ See doc/COPYRIGHT.rdoc for more details.
   <% end %>
 </p>
 
-<% if relations.any? %>
-  <table class="list work-package-data-table">
-    <thead>
-      <tr>
-        <th><%= Relation.human_attribute_name(:to)%></th>
-        <th><%= WorkPackage.human_attribute_name(:type)%></th>
-        <th><%= WorkPackage.human_attribute_name(:start_date)%></th>
-        <th><%= WorkPackage.human_attribute_name(:due_date)%></th>
-        <th><spen class="hidden-for-sighted"><%= t('button_delete') %></span></th>
-      </tr>
-    </thead>
-    <tbody>
-      <%= render :partial => 'relation', :collection => relations,
-                                         :as => :relation,
-                                         :locals => { :work_package => work_package } -%>
-    </tbody>
-  </table>
-<% end %>
+<table id="work-package-relations-table" class="list work-package-data-table <%= 'hidden' if relations.empty? %>">
+  <thead>
+    <tr>
+      <th><%= Relation.human_attribute_name(:to)%></th>
+      <th><%= WorkPackage.human_attribute_name(:type)%></th>
+      <th><%= WorkPackage.human_attribute_name(:start_date)%></th>
+      <th><%= WorkPackage.human_attribute_name(:due_date)%></th>
+      <th><spen class="hidden-for-sighted"><%= t('button_delete') %></span></th>
+    </tr>
+  </thead>
+  <tbody>
+    <%= render :partial => 'relation', :collection => relations,
+                                       :as => :relation,
+                                       :locals => { :work_package => work_package } -%>
+  </tbody>
+</table>
 
 <%= form_for(work_package.new_relation,
              :as => :relation,