Add a visual buff icon for blood fletcher

I’d like a visual indication or some sort of feedback that blood fletcher is down or up. Currently, there is no indication that I can use, and the only times I know that it is used is when I suddenly get an arrow. This lack of feedback feels clunky, and I’d like for a buff icon to appear on the buff bar giving me indication that I can use blood fletcher. That or a buff telling me that blood fletcher is on cooldown.

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