Add additional UK loading gauges & combinations

[Liaely]

Adds the additional gauges W9Plus, W10A, and combinations involving thereof, as well as some extra combinations.

See comments & commits as to order.

[hiddewie]

Thanks!

The ordering is not following the coloring at the moment, it was originally sorted by lowest W value, basically increasing in size.

Should the coloring be adapted to the new ordering of the entries?

[Liaely]

Thanks!

The ordering is not following the coloring at the moment, it was originally sorted by lowest W value, basically increasing in size.

Should the coloring be adapted to the new ordering of the entries?

Ah, apologies. I didn't realise that that was the order.

I re-ordered the entries look from from the development perspective, but I will order it according to final W number.

One idea though, how about ordering the individual (e.g. W10 only) before the combinations?

In case you're wondering how I decided on combinations it was based on small combinations, and realistic guesses for the longer combinations.

[Liaely]

Ok, I've re-ordered it in 178a8b4 to be the individual gauges first, then combinations. I've also done another one (bf27a5f) which is strictly colour only.
My view is that the first is the better approach, whereas the latter is not, but if the latter is preferred, go ahead as is. If the first is preferred, please revert bf27a5f and merge afterwards.
Thanks!