MAGETWO-80150: Fix in stripped min length validation when value has special characters #11084

 - Merge Pull Request magento/magento2#11084 from rubenRP/magento2:I#9920
 - Merged commits:
   1. 6e5c8f0
   2. 6be8769

Author: Volodymyr Kublytskyi

app/code/Magento/Ui/view/base/web/js/lib/validation/rules.js

@@ -244,7 +244,7 @@ define([
         ],
         'stripped-min-length': [
             function (value, param) {
-                return value.length >= param;
+                return _.isUndefined(value) || value.length === 0 || utils.stripHtml(value).length >= param;
             },
             $.mage.__('Please enter at least {0} characters')
         ],