Seminar page website slug auto-fills incorrect data

[jchate6]

I Love that the slug can now be edited. However it pulls from the seminar title which will change and is a bit long in many cases.

It SHOULD pull from the last name and add a incrementing number if the last name matches a previous page.

For example the url should be lco.global/seminar/cartwright/ not lco.global/seminar/the-dark-and-icy-surfaces-of-the-large-moons-of-uranus:-modified-by-system-wide-processes? which is what it would default to if written now.