Don't use rubble in some situations

[historic_bruno]

Rubble is currently shown when any structure is destroyed, including foundations. In some cases, this may not be desirable: when the player destroys their own building or when a newly placed foundation is destroyed. I doubt a player destroying their own structure would involve fire and rubble, but would be a more orderly process. For foundations, it may be adequate to have only a decal for rubble and not reuse the ugly foundation mesh.

[Imarok]

Move tickets to Simulation as UI & Simulation got some sub components.