Merge branch 'release/wap-im' of git.yoho.cn:fe/yohobuywap-node into release/wap-im

@@ -174,6 +174,8 @@ var chat = {
                 self.canManualService && self.switchService('human');
             })
             .on('keydown.chat.sendText', '.text-in', function(event) {
+                document.body.scrollTop = document.body.scrollHeight;
+
                 if (event.which === 13) {
                     let val = $.trim(event.target.value);