Allow publishers to select which bundle is shown on a game page

[hlashbrooke]

If a game is in multiple bundles, there's no way of controlling which one is displayed on the game page.

It would be great to have a way to control this - perhaps with a list of bundles on the edit screen that publishers can order by priority. So if the bundle at the top of the list finishes then it will display the next one. New bundles can be added to the bottom of the list automatically.

Another solution would be fine - that's just the one off the top of my head.