Jsonmodels example "enterprise" mode doesn't work anymore

The "enterprise" mode of jsonmodels example does not work anymore. The controls used have been moved, so the imports need to be changed. Also, the model won't rotate anymore, either with mouse or animate button.

To repro, comment out "#define NO_ENTERPRISE" from jsonmodels example main.cpp.

Probably the best fix is simply to remove the "enterprise" mode altogether, as it doesn't really add anything to the example.