FacturaScripts: Stored XSS in WidgetVariante and WidgetSubcuenta modal lists via HTML-attribute decoding of `Tools::noHtml`-escaped quotes inside `onclick=`

Summary WidgetVariante::renderVariantList Core/Lib/Widget/WidgetVariante.php:298-330 and WidgetSubcuenta::renderSubaccountList Core/Lib/Widget/WidgetSubcuenta.php:290-321 build the row for each modal hit by concatenating the user-controlled referencia / codsubcuenta field directly into a...