[1.6.6]Over Mind+Projection=Thought form infinite stack

[starsapphire]

Steps to reproduce:

• Choose a Solipsist
• Learn Over Mind and Projection
• Summon a thought form
• Use Projection
• Use Over Mind, your projection disappeared.
• Switch to your main character, the buff remains, and you can repeat this to get infinite stacked buff.

Maybe we should give unlearn_on_clone=true to Over Mind