Added label and prompt option

[slischka]

Simplifies:

$datagrid->onRender[] = function (Datagrid $datagrid): void {
	if (isset($datagrid['form']['actions']['action'])) {
		/** @var \Nette\Forms\Controls\SelectBox $selectBox */
		$selectBox = $datagrid['form']['actions']['action'];
		$selectBox->setPrompt('globalActions.action.prompt');
	}

	if (isset($datagrid['form']['actions']['process'])) {
		/** @var \Nette\Forms\Controls\SubmitButton $selectBox */
		$selectBox = $datagrid['form']['actions']['process'];
		$selectBox->caption = 'globalActions.process.label';
	}
}

To

$datagrid->setGlobalActionSelectPrompt('globalActions.action.prompt');
$datagrid->setGlobalActionProcessLabel('globalActions.process.label');

Or some better solution ?