Unable to reorder quote lines in 7.10...?

We have a brand new Professional instance, running on 7.10.1. I expected to be able to re-order quote line items, as per the functionality introduced in v7.9.

However, we do not have the icon to reorder the lines, nor does the cursor become a crosshairs when you hover over it.

I've tried in two browsers, and also tried a QRR - but still no luck.

Why isn't this available in 7.10.1?

We're hosted by Sugar in their cloud.