More divesite management breakage..

[Linus Torvalds]

So the Uemis downloader breaks divesite management even more.

Let's say you download from one dive computer, set the dive sies, add
your buddies, get everything ready. Then you download the same dives
from your second dive computer that happens to be an Uemis device, and
randomly - by pure luck (or lack of it), some of your dive sites that
you edited and added GPS coordinates for will now be corrupted.

Why?

The Uemis downloader creates that *completely* bogus "from Uemis"
divesite for the dives it downloads. And so when we merge the dives,
who knows which one we'll pick - the one we carefully edited by hand,
or the crap useless one from the Uemis downloader.

Yeah, Dirk, let's not do that.

            Linus