nie można kliknąć select2 w modalu
$modal = Modal::widget([ 'header' => $this->header, 'id' => 'ajax-preview-modal', 'size' => $this->modalSize, 'options' => ['tabindex' => null], ]);
$modal = Modal::widget([ 'header' => $this->header, 'id' => 'ajax-preview-modal', 'size' => $this->modalSize, 'options' => ['tabindex' => null], ]);