Added missing id attribute to the date input

Author: vovayatsyuk

app/code/Magento/Ui/view/frontend/web/templates/form/element/date.html

@@ -8,6 +8,7 @@
     hasFocus: focused,
     datepicker: { storage: value, options: options },
     attr: {
+        id: uid,
         value: value,
         name: inputName,
         placeholder: placeholder,