Add a simulation button to the event fleets & phalanx fleets.
With an additional selection to indicate if the target should be the attacker or defender.

This will also include the universe settings to get the correct fleetspeed, etc...
The fleet in the details popup will be loaded in to TrashSim along with the coordinates.

A maybe: also add the current drive & combat techs of the player who clicks the button.

In development