Restack HUD items during hud_update

[tacotexmex]

Currently, if an effect completes its duration, a second effect applied after the first one still remains in its "downpushed" position, instead of what's expected: taking first place (essentially floating to the top).

[pyrollo]

Actually, that was on purpose. The idea was not to have "moving" effects huds. I mean, once you start to be affected by an effect, it is displayed and stays in place.
As the effects are not supposed to last too much (at least displayed effects), I supposed they will stay tidied up.

[tacotexmex]

I see. In my game I'm going to include long-term effects, such as starvation. So I'm assuming that the effects will be scattered all across the HUD area after some time, which is not very nice.

From what I can tell with the HUD code you have it shouldn't be too hard to restack the items ( though if I fully understood it I would have improved it myself for inclusion in #6 of course).