Customer Self-Service Portal

Change scheduled maintenance window once it is active

It would really be nice if we could change a scheduled maintenance window while it is active.  Suppose you are in the process of doing maintenance and you have a 4 hour maintenance window set up.  After 3 hours you are done and you would like to see Site24x7 start testing again so you can confirm everything is okay before you go home.  The only way I can see to do that is to completely delete the maintenance window.  I would like to keep the maintenance window there for historical reasons.

Is there some way to do this that I am missing?