Merge branch 'MAGETWO-99832' of https://github.com/magento-tango/magento2ce into pr_2019_06_11_ce

Author: vkolesny

app/code/Magento/Ui/view/base/web/js/form/element/date.js

@@ -125,17 +125,13 @@ define([
                     shiftedValue = moment(value, dateFormat);
                 }
 
-                if (!shiftedValue.isValid()) {
-                    shiftedValue = moment(value, this.inputDateFormat);
-                }
                 shiftedValue = shiftedValue.format(this.pickerDateTimeFormat);
-            } else {
-                shiftedValue = '';
-            }
 
-            if (shiftedValue !== this.shiftedValue()) {
-                this.shiftedValue(shiftedValue);
+                if (shiftedValue !== this.shiftedValue()) {
+                    this.shiftedValue(shiftedValue);
+                }
             }
+
         },
 
         /**