Yup, this is it. Properties are defined in that file.

In this particular case, though, you probably don't want it to be a property on the entry. Right now, the sticky_select option is a userprop -- since the user has sticky entries. If you want the update page to toggle sticky entries, you probably want to have the post method set the userprop appropriately.

Do you have a bug reference for this so I can take a peek?