Reorder environments on the deployments and project pages

Deployments are currently arranged in the order that they are created.

It would be nice to be able to rearrange deployments.

This would look much nicer in a situation where a deployment may only proceed if another succeeded (i.e. production deployed only if testing deployed).

Would potentially look something like this:

(shows that 1.14 was the last successful version that made it to dogfood, and 1.10 was the last successful version that made it to production)