Cannot reinstall module - addReturnTab function error

[damiweb]

This function doesn't check if Tab already exists. It causes that in next installation attempt Prestashop throws Exception - module cannot be installed properly again.

PrestaShop-1.7/dotpay.php

Lines 1235 to 1248 in bf7401c

	private function addReturnTab()
	{
	// Prepare tab
	$tab = new Tab();
	$tab->active = 1;
	$tab->class_name = 'AdminDotpayRefund';
	$tab->name = array();
	foreach (Language::getLanguages(true) as $lang) {
	$tab->name[$lang['id_lang']] = 'Dotpay Refunds';
	}
	$tab->id_parent = -1;
	$tab->module = $this->name;
	return $tab->add();
	}

Workaround for this issue could be something like this:

// ...
// Prepare tab 
$tabClass = 'AdminDotpayRefund';
$existingAdminTab = Db::getInstance()->getValue('SELECT id_tab FROM ' . _DB_PREFIX_ . 'tab WHERE class_name LIKE "' . $tabClass . '";');
if ($existingAdminTab) {
	return true;
}
// ...

But it would be better to uninstall tab together with module, to avoid issues like this.