[FIX] web: editable list view waits for record to be loaded

The editable list view method 'edit' is supposed to wait for the
record to be completely loaded.  But when loading the defaults values,
it ignored the actual loading and completed too early.  This commit
chains the deferred with the form record.

addons/web/static/src/js/views/list_view_editable.js

@@ -83,16 +83,18 @@ var Editor = Widget.extend({
         return (this.is_editing() && !this.record.id);
     },
     edit: function (record, configureField) {
+        var self = this;
         // TODO: specify sequence of edit calls
         var loaded;
         if(record) {
             this.form.trigger('load_record', _.extend({}, record));
             loaded = this.form.record_loaded;
         } else {
-            loaded = this.form.load_defaults();
+            loaded = this.form.load_defaults().then(function() {
+                return self.form.record_loaded;
+            });
         }
 
-        var self = this;
         return loaded.then(function () {
             return self.do_show({reload: false});
         }).then(function () {