0.2.30.0 - Defence Scenario (0.2 Alpha) — Sprocket Steam update #139333

Hi all, This patch brings the Defence scenario across to the 0.2 alpha. Additions Reimplemented the Defence scenario. Added a distance travelled since last refuel to some scenarios. You'll need to include enough fuel in your design to be able to start the scenario. You'll enough excess to complete the scenario, so fuel leaks can now become a genuine concern. Added a scenario budget widget to show the scenario's mass limit and how many vehicles will join you. Fixes Fixed a case of freeform merges corrupting the structure. Fixed a case of freeform merges failing on edges not connected to any faces. Fixed fire extinguishing not working. Fixed fuel tank leaks not working. Fixed destruction of one transmission in a twin transmission preventing you from having some mobility using the fully functional one. Default fire ext...