title: Add a custom button on the admin screen of Broadleaf and provide action for it.
body: <p>I want to create a new tab in the order column (Cancellation tab) at Broadleaf admin screen.
  In that I want to create an HTML page which will have a cancel button.Once the button is clicked, I want certain information to get loaded in the related database table. </p>
  
  <p>Please help me with creating a new tab, HTML page inside it and creating an action button on it. </p>
  
  <p>Regarding Creatng a new tab. I have created an annotations as follows in OrderImpl domain class:</p>
  
  <p>@OneToOne(targetEntity = OrderCancellationImpl.class)
      @JoinColumn(name = "CANCELLATIONID")
      @AdminPresentation(friendlyName = "OrderImpl_OrderCancellation", tab = Presentation.Tab.Name.Cancel, tabOrder = Presentation.Tab.Order.Cancel)
      protected OrderCancellation orderCancellation; </p>
  
  <p>tab name and tab order--> I have given a particular tab name and its order value.</p>
  
  <p>But it doesnt create a new tab. Please help</p>
  
  <p>Thanks in advance </p>