[FeatureReq] Hide inventory

[relitrix]

Is your feature request related to a problem? Please describe.
Portable storage mods, such as the backpacks from Inmis, can be easily exploited as they lack protection mechanisms. The allow-item-moving and allow-item-dropping settings do not function as expected.

Describe the solution you'd like
Most elegant and simple solution I see is to hide player's inventory until successful authentication.