[FIX] website_forum: wait templates are loaded before binding events

This is required since a4dc9a8032

addons/website_forum/static/src/js/website_forum.share.js

@@ -7,7 +7,7 @@ var base = require('web_editor.base');
 var SocialShare = require('website.share');
 var website = require('website.website');
 var qweb = core.qweb;
-ajax.loadXML('/website_forum/static/src/xml/website_forum_share_templates.xml', qweb);
+var tmpl = ajax.loadXML('/website_forum/static/src/xml/website_forum_share_templates.xml', qweb);
 
 
 if(!$('.website_forum').length) {
@@ -44,7 +44,7 @@ var ForumShare = SocialShare.extend({
     }
 });
 
-base.ready().done(function() {
+$.when(base.ready(), tmpl).done(function() {
 
     // Store social share data to display modal on next page
     $(document.body).on('click', ':not(.karma_required).oe_social_share_call', function() {