Range/area highlight for nontargetable AOE abilities

[omeg]

If you use a targetable AOE effect (line, cone, circle) you can see what size/shape it covers before actually using it. Nontargetable abilities lack that kind of feedback however. I'd like to see how far my Bellowing Roar or Irresistible Sun reaches without manually counting tiles. Not sure how to implement that, maybe show a target overlay (like for cones etc) when you hower your mouse over the talent icon?