Manage Events, Current & Upcoming should ignore past events with no end date

On civicrm.org I just noticed that the Current and Upcoming list of events had a lot of events with start dates from several years ago. Turns out none of them had an end date, which seems to explain why they are showing. I'm putting in end dates to clean up the site, but the software should filter more carefully by excluding events from the list with start date before now() and end date that is null.