FPDI importPage does not work with autoPageBreak=1

[maechler]

The fix to this issue should at least be mentioned in the section trouble shooting. Probably we can also include a fix like this for EmptyFPDI:

class YourPDF extends FPDI {
   public function AddPage($orientation = '', $format = '', $rotationOrKeepmargins = false, $tocpage = false)
   {
      parent::AddPage($orientation, $format, $rotationOrKeepmargins, $tocpage);
      
      if ($this->tpl !== 0) {
          $this->useTemplate($this->tpl);
      }
   }
}

It has to be tested whether this works if different pages are imported in one PDF or not. It should also be possible to not import the template anymore, if the PageViewHelper is used without the option importPage. That is not possible with this quick fix. Maybe we could also include an option to make this optional.