code: @Nullable
    @OverrideOnDemand
    protected IHCNode createPageHeader (@Nonnull final ISimpleWebExecutionContext aSWEC,
                                        @Nullable final IHCNode aPageTitle)
    {
      return BootstrapPageHeader.createOnDemand (aPageTitle);
    }
docs: Create the text above the login form.
  
  @param aSWEC
  Web page execution context.
  @param aPageTitle
  Page title as provided in the constructor. May be <code>null</code>.
  @return The created node or <code>null</code>.