Add several minutes of default leeway to reduce issues with time mis-alignment

There is another request for a container parameter. The goal here is just to make it work better for everyone by default in a simple way

I pulled all the trivial test and style changes over (getting tests to run on Drupal 9 and 10) to 📌 Get 2.x tests running on both Drupal 9 and 10 Active

Code looks good to me.

forward ported to 3.x also

Automatically closed - issue fixed for 2 weeks with no activity.