Clicking anywhere in the scene results in the following error message in the console: "object.material._physijs is undefined"

[Martin-Cox]

To reproduce: Do a new build in a new dev environment, then load up dev server at localhost:4000, enter simulation by clicking past the loading screen, then try to click anywhere in the 3D scene.

[Martin-Cox]

Reason: The version of phyijs included with the package "physijs-browserify" is outdated. The latest version of physijs includes a fix for this problem

Solution: Replace "physi.js" in node_modules/physijs-browserify with the version included in /js/external