Hotfix 0.4.15

- Chests and filters optimization. Fixed crashes caused by issues with chests/filters.
- Retreating allies will not be selected after selecting all warriors (button "~" by default). Also if one warriors from selected squad start to retreat he will be dismissed from squad. Previously players accidentally order retreating allies to fight.
- Allies will not return to fight after retreating if they have too low hp.
- Enemies' retreat chance was slightly decreased.
- Icon (notification) was added for retreating allies/enemies.
- All warriors will go to main square after enemies appearance.
- Default aggression distance was decreased from 35 to 20 meters (aggro distance for previously created games isn't changed, but you can change it in the edicts).
- Fixed some issues with farmer's logic.