Add timing for the showing of the EU Cookie popup

I've added a patch with a delay of 5 sec for the popup

Thanks for the contribution @ooa33. Let's see if we can find somebody to review it :)

Actually, when I review your code, I see that it needs work.

From what I understand (after a very quick glance), the patch causes the banner to be delayed by 5000 ms on every site of which the module is used.

It would be better if the delay could be configured by the administrator. For sites where they do not desire to delay the banner by a fixed amount of time, they could set the value to 0 (which should be the default value) to indicate that they don't want to implement a delay.

Those who want a delay can set it to 5000 or any other value.