[JASS] hiding passive abilities?

[normalice]

Is there a way to hide passive abilities? i.e. a paladin's devotion aura. I would like him to be able to allocate skill points in it, but I don't want the passive icon showing up in his command window (i need the space).

 

[LordDz]

http://www.hiveworkshop.com/forums/general-mapping-tutorials-278/theory-behind-spellbooks-228604/

Basicly any spells in a disabled spellbook works but doesn't show up.