show recent updates button for not installed packages

[fgsch]

the way cydia works right now is to only show new packages in the changes tab for the not installed ones. if an update for an old package appears, cydia won't show it to avoid spamming the list. it'd be nice if there is a setting to toggle this, so changes can behave either cydia or installer way, where all the updates are shown (for new and old packages).