Set Purple.Notification:create-timestamp to local now if not set
Review Request #3848 — Created Feb. 18, 2025 and submitted — Latest diff uploaded
This saves everyone from having to manually call
Purple.Notification.set_created_timestamp_now manually but still allows the
property to be set at instantiation as well as after the fact.Also remove Purple.Notification.set_created_timestamp_now since it is no longer necessary.
Ran the tests under valgrind and called in the turtles.