title: Camunda BPM 7.2: show process variable in task-list (not form)
body: <p>I installed camunda-bpm-wildfly-7.2.0, which comes with a deployed camunda-example-invoice-7.2.0.war.
  In the task-list (i don't mean the task-form), process variables are displayed (e.g. Invoice Amount, Invoice Number etc.) for example for an Assign Approver task or an Approve Invoice task.</p>
  
  <p>Now, when i deploy my own Process Application War, process variables (e.g. customerNumber, orderNumber) are displayed in the task form (embedded form), but not in the task-list! I marked the two variables readonly in the embedded task form and also in the user-task node in the modeller (properties, Form Fields).</p>
  
  <p>What else do i have to do to display those variables in the task-list?</p>
  
  <p>Thanks,
  Michael</p>
  
  <p>p.s.
  unfortunately i can't post a screenshot; need at least 10 reputations...gargh</p>