Convert PidginNotificationList to GtkListView
Review Request #3011 — Created March 7, 2024 and submitted
This conversion was done because apparently GtkListBox starts getting slow around 100 items and this could grow fast if someone has a bunch of accounts. We'll need to convert the rest of the widgets, but those can come later.
Compiled with the turtles. Also manually added weak refs to the widgets to make sure they were getting cleaned up properly.