Comment 3 for bug 1516383

Yes, it's the tango palette and you're right, it has not enough colors. After a restart these colors still wrap though but it's not a big deal that this doesn't happen immediately. The horizontal scrollbar isn't there so the usability is the same.

However, I remember that this happened with other palettes as well and 've managed to get this effect with Inkscape's default palette (see screenshot). Not on the first try though. I clicked around several times (turning wrap on and off, changing the swatch width). But pretty quickly I ended up with the attached screenshot where selecting "wrap" for the default palette only increases the height of the palette but the colors don't wrap. Settings are medium height, medium width, no border and "wrap".