Using items should remove invisible status effect

[isotor]

I have:

• [x] searched existing issues (http://github.com/darkstarproject/darkstar/issues/) to see if the issue I am posting has already been addressed or opened by another contributor
• [x] checked the commit log to see if my issue has been resolved since my server was last updated

Client Version (type /ver in game) : 30190328_2

Source Branch (master/stable) : master

Additional Information (Steps to reproduce/Expected behavior) :

Tested with Tonko followed by an Antidote, invisible status effect persisted.

[cyclebiff]

Sending a pet to attack as bst (and probably smn / pup) doesn't remove invisible either, while retreat does remove the effect.

Can't remember if it does in retail as well.