Regarding the status being "unreviewed" instead of "public" could be because of all the stuff being made being the scenes by ```addon.update```.

I'm not sure I agree with your statement above: we're talking about automatic updates right? So I believe that:
* an installed **public** version will only receive **public** updates
* an installed **prelim** version will receive **public** and **prelim** updates (this is the aim of this PR if I understand it correctly)
* an installed **beta** version will receive **public** and **beta** updates (what about prelim versions?)

Am I wrong?