Fixed the issue which was causing the 'Lab' tab in the masthead to appear automatically. Now, this tab is visible only when request types have been created by the admin.

templates/base_panels.mako

@@ -149,15 +149,17 @@
     ${tab( "workflow", "Workflow", h.url_for( controller='workflow', action='index' ))}
     
     ${tab( "libraries", "Libraries", h.url_for( controller='library', action='index' ))}
-        
-    <td class="tab">
-        <a>Lab</a>
-        <div class="submenu">
-        <ul>            
-            <li><a target="requests" href="${h.url_for( controller='requests', action='index' )}">Sequencing Requests</a></li>
-        </ul>
-        </div>
-    </td>
+    
+    %if trans.request_types():
+        <td class="tab">
+            <a>Lab</a>
+            <div class="submenu">
+            <ul>            
+                <li><a target="requests" href="${h.url_for( controller='requests', action='index' )}">Sequencing Requests</a></li>
+            </ul>
+            </div>
+        </td>
+    %endif
 
     %if app.config.get_bool( 'enable_tracks', False ):
     <td class="tab">