Add a visual indicator for Jax's E.

The animation for his E is so subtle that I usually don't see it, especially if I'm right on top of him. If I knew when he popped his E I would play smarter but can't because it's so hard to see and by the time I attack him and I see he took no damage it's already too late. Annie, Jhin, Yasuo, Riven, etc all have visual indicators for their abilities.

Even a simple glow on him that lasts for the duration of the active with a more obvious sound effect on cast would be really helpful.