Reload Tank Definitions on database reload

[blowfishpro]

ModuleManager 2.6.7 will now call any static method with the signature ModuleManagerPostLoad() ( or the same instance method on any active MonoBehavior instance) when the game database is reloaded (or loaded for the first time). Implementing this method in MFSSettings would allow the tank definitions to be reloaded without restarting the game. It would also simplify loading since the load check in ModuleFuelTanks would no longer be necessary. MM calls this method right before loading parts, but right after loading resources, so the correct pieces should be in place when they need to.