[FIX] web: fix FieldDate widget default value

The FieldDate widget did not properly select the correct default value
when opening the datepicker.  We did not notice it, because the test
hardcoded the february month.

addons/web/static/src/js/fields/basic_fields.js

@@ -162,11 +162,12 @@ var FieldDate = InputField.extend({
     //--------------------------------------------------------------------------
 
     _makeDatePicker: function () {
-        return new datepicker.DateWidget(this);
+        return new datepicker.DateWidget(this, {defaultDate: this.value});
     },
     _renderEdit: function () {
         this.datewidget.set_value(this.value);
     },
+
 });
 
 var FieldDateTime = FieldDate.extend({
@@ -177,7 +178,7 @@ var FieldDateTime = FieldDate.extend({
     //--------------------------------------------------------------------------
 
     _makeDatePicker: function () {
-        return new datepicker.DateTimeWidget(this);
+        return new datepicker.DateTimeWidget(this, {defaultDate: this.value});
     },
 });
 

addons/web/static/src/js/widgets/date_picker.js

@@ -50,13 +50,14 @@ var DateWidget = Widget.extend({
         this.picker = this.$input.data('DateTimePicker');
         this.$input.click(this.picker.toggle.bind(this.picker));
         this.set_readonly(false);
-        this.set_value(false);
     },
     set_value: function(value) {
         this.set({'value': value});
         var formatted_value = value ? this.format_client(value) : null;
         this.$input.val(formatted_value);
-        this.picker.date(formatted_value);
+        if (this.picker) {
+            this.picker.date(formatted_value);
+        }
     },
     get_value: function() {
         return this.get('value');