Arcane/shadow combat shouldn' stop sustained talents

[Postman]

It should stop itself instead if there is not enough mana. Right now Arcane/shadow combat stop sustained talent if there is not enough mana. That is not logical and easily avoided by paying attention to mana bar. But it would be more UI-freindly just automatize it - if there is no mana arcane/shadow combat stop. Even better would be not stop combat completely but suspend it until enough mana generated.

[darkgod]

good idea, done