Anyway to alter combat key bindings?

[Aetheron]

So, being fat-fingered, I occasionally accidentally trigger ultimate skills when interacting with containers, or just trying to chat. I'd like to make a mod that would either disable ultimate key bindings when out of combat, and/or require the ultimate key to be held longer or double tapped to trigger an ultimate when out of combat. I suspect that this isn't possible since it would involve tampering with a combat trigger. Any thoughts?

Thx,
-A