This fixes a number of issues with formations:
- Gives the controller an obstruction, so that it can actually get in range of stuff.
- Makes sure units stay in Formation.IDle when they are idle so that D1337/D1901 can work their magic
- Warn if animals enter this state.
This fixes formation behaviour from what I can notice. Still need a general fix for "facing the destination" but I intend for that to come later.