The cometd demo is failing:
This is "normal" as dojox/cometd is not anymore provided with Dojo. Is
someone willing/planning to update the demo to use the external cometd
package? (not sure how easy it might be with the way we build demos)
If not maybe we should remove it from the website to avoid people
complaining with a failing demos?
(BTW we have fixed a few other demos recently so might be worth
redeploying them anyway).