Disable item pickup while vanish

[marysophie05]

Feature description

Option to disable item pickups while vanished.
It would be in the config file like: disable-item-pickup-while-vanish.

How the feature is useful

For example:

• If an admin teleports to a suspicious player, and he (the admin) picks up an item from the player by accident, the suspicious player will know that someone is watching him, and might take more precautions while cheating.

This optional feature would prevent these kinds of situations from happening.