Make sorting games by highest drop value sort games by average, not total, card value.

[badp]

Say I have three cards for Tiny Barbarian DX and seven cards for Awesomenauts available to me. If I go to my badge page and sort games by highest drop value, what I get is:

1. Awesomenauts for $0.30
2. Tiny Barbarian DX for $0.26

However, I have 7 drops for Awesomenauts and 3 drops for Tiny Barbarian, so things should actually look like this:

1. Tiny Barbarian DX for $0.09 each
2. Awesomenauts for $0.04 each

This is doubly important as the $0.04 figure is AFAIK before Valve's cut, and as a result actual sales come up to $0.02 per card, or $0.14 total. Tiny Barbarian DX, on the other hand, comes up to 3 × $0.07 or $0.21 total: even if you sort by total card "value", Awesomenauts should not come up before Tiny Barbarian DX.

Sorting by average individual card value instead of average total card value would fix this.