Default admin list sort

I request a config option to set the default sort of the timeline list in admin. The current default sort is startdate DESCending. This ordering is unexpected as it is not the same as the frontend and puts events farthest out into the future at the top of the list rather than ones that are more immediate and need attention.

It is more appropriate for our usage to sort the admin list exactly the same as we have the front-end list and by what our users are expecting from an event calendar - a chronological list by startdate ASCending.