NzbDrone/NzbDrone — comment on commit 0025bb9840337c923c1297cf51166db36d8b232b
File: NzbDrone.Web/Controllers/SeriesController.cs line 186
By markus101:

Two reasons for doing it this way, the first being we no longer have events that fire when the grid loads, so we would need to find some other way to set the top season ignore button, the other being that this should result it faster loading of the page since its a single DB call versus n calls (where n = number of seasons), since they are no longer AJAX loaded.