misc: include job label in page <title> (#73416)

wcs/backoffice/root.py

@@ -257,13 +257,13 @@ class RootDirectory(BackofficeRootDirectory):
         return menu_items
 
     def processing(self):
-        html_top('/')
         try:
             job = AfterJob.get(get_request().form.get('job'))
         except KeyError:
             return redirect('.')
 
         get_response().add_javascript(['jquery.js', 'afterjob.js'])
+        html_top('/', title=job.label)
         return template.QommonTemplateResponse(
             templates=['wcs/backoffice/processing.html'], context={'job': job}
         )