[FIX] website: SEO keywords

Seen behavior: SEO keywords not saving

Expecte behavior: SEO should save

Reason: destroy event method from dialog.js is now hidding modal
programmatically. Which at the end call twice the keywords save
method.
The second time there were no keywords passed to that function
which is causing that behavior (saving empty array).

addons/website/static/src/js/menu/seo.js

@@ -455,6 +455,7 @@ var SeoConfigurator = Dialog.extend({
             data.website_meta_keywords = this.keywordList.keywords().join(', ');
         }
         this.saveMetaData(data).then(function () {
+           self.htmlPage.changeKeywords(self.keywordList.keywords());
            self.close();
         });
     },
@@ -546,10 +547,6 @@ var SeoConfigurator = Dialog.extend({
         $preview.empty();
         preview.appendTo($preview);
     },
-    destroy: function () {
-        this.htmlPage.changeKeywords(this.keywordList.keywords());
-        this._super.apply(this, arguments);
-    },
     updateTable : function (removed) {
         var self = this,
              val = removed ? (this.$el.find('tbody > tr').length - 1) : (this.$el.find('tbody > tr').length);