Updated Magento_Rule rules.js file

Added calendar initializaton for Conditional Rules when a rule is created for the 1st time

Author: Burlacu Vasilii

app/code/Magento/Rule/view/adminhtml/web/rules.js

@@ -220,6 +220,8 @@ define([
 
             var elem = Element.down(elemContainer, 'input.input-text');
 
+            jQuery(elem).trigger('contentUpdated');
+
             if (elem) {
                 elem.focus();