Call change() when a Date field is updated via visual calendar

issue10647
review362341002
(grafted from 474abeca9f9b4c8199ac333b3e8a178ac1c88adb)

--HG--
branch : 6.0

src/view/form.js

@@ -1623,7 +1623,7 @@ function eval_pyson(value){
                 if (value) {
                     value = this._parse(this._input_format, value);
                     value = this._format(this.get_format(), value);
-                    this.date.val(value);
+                    this.date.val(value).change();
                     this.date.focus();
                 }
             }.bind(this));
@@ -4995,7 +4995,7 @@ function eval_pyson(value){
                 if (value) {
                     value = this._parse(this._input_format, value);
                     value = this._format(this.format, value);
-                    this.input.val(value);
+                    this.input.val(value).change();
                     this.input.focus();
                 }
             }.bind(this));