* Restore serialization
* Drones: add tooltip
* Drones: add hull points and take area damage
* Organize arena objects and information in layers
* Allow to cancel last moves
* Add more visual effects to weapons, hits and explosions
* Add keyboard shortcuts for actions
* Effect should be random in a range (eg. "damage target 50-75")
* Add an overload/cooling system
* Add auto-move to attack
* Escape key should cancel selected action
* Merge identical sticky effects
* Handle effects overflowing ship tooltip when too numerous
* Proper arena scaling (not graphical, only space coordinates)
* Add a fleet evaluator to make balanced fleets
* Fix AI playing in background in GameSession.spec.ts
* Mobile: think UI layout so that fingers do not block the view (right and left handed)
* Mobile: display tooltips larger and on the side of screen where the finger is not
* Mobile: targetting in two times, using a draggable target indicator
* AI: apply safety distances to move actions
* AI: bully AI crashes when winning a battle (trying to move toward null ship!)
* Add a defeat screen (game over for now)
* Add a victory screen, with loot display
* Add retreat from battle
* Map : restore ability to jump to other systems
* Map : add stores and shipyards