[fixed] zo_sortfilterlist inconsistency
 

Just noticed something strange about the code for ZO_SortFilterList. In SetLockedForUpdates the "UPDATE_VISIBLE" variable is not declared, meaning it will never be able to reach the self:RefreshVisible(), as it is checking if self.pendingUpdate is set. But that is probably not an issue right now, since UPDATE_VISIBLE is not used at all in RefreshVisible and instead it calls ZO_ScrollList_RefreshVisible directly, without checking if it is locked. Meaning the lock doesn't prevent refresh visible from getting called.

We'll probably fix this by exempting visible from the locking and remove the case.