[FIX] web: search view: don't crash when typing a date

Before this rev., it crashed when the user typed a date (actually,
the last character of a date) in the search view (e.g. in
Accounting > Customer Invoices).

addons/web/static/src/js/chrome/search_inputs.js

@@ -356,8 +356,7 @@ var DateField = Field.extend(/** @lends instance.web.search.DateField# */{
 
         var m = moment(v, t === 'datetime' ? 'YYYY-MM-DD HH:mm:ss' : 'YYYY-MM-DD');
         if (!m.isValid()) { return $.when(null); }
-        var d = m.toDate();
-        var date_string = field_utils.format[this.attrs.type](d, {type: t.attrs.type});
+        var date_string = field_utils.format[t](m, {type: t});
         var label = _.str.sprintf(_.str.escapeHTML(
             _t("Search %(field)s at: %(value)s")), {
                 field: '<em>' + _.escape(this.attrs.string) + '</em>',
@@ -367,7 +366,7 @@ var DateField = Field.extend(/** @lends instance.web.search.DateField# */{
             facet: {
                 category: this.attrs.string,
                 field: this,
-                values: [{label: date_string, value: d}]
+                values: [{label: date_string, value: m.toDate()}]
             }
         }]);
     }