panels_renderer_ipe shuts off property $admin of panels_renderer_editor

The method prepare_panes() shuts "admin mode" on and off without any further considerations.
In the methods comment it says it's necessary to shut it on, but the hard coded shut off afterwards may mix up the admin mode state:

class panels_renderer_ipe extends panels_renderer_editor {
  ...
  function prepare_panes($panes) {
    // Set to admin mode just for this to ensure all panes are represented.
    $this->admin = TRUE;
    $panes = parent::prepare_panes($panes);
    $this->admin = FALSE;
  }
  ...
}

Easy fix to this issue:

class panels_renderer_ipe extends panels_renderer_editor {
  ...
  function prepare_panes($panes) {
    // Set to admin mode just for this to ensure all panes are represented.
    $previous_admin_mode = $this->admin_mode;
    $this->admin = TRUE;
    $panes = parent::prepare_panes($panes);
    $this->admin = $previous_admin_mode;
  }
  ...
}