[2019] Add Icon (in Addition to the sound you hear before an enemy hits you in the back)

I would like something like this as well, mostly as a help for those who are hard of hearing. I’ve suggested, based on some links a community hero passed to me on the subject of accessibility, like a screen edge glow or visual stimulus that could be opted into.

The next patch has some fixes to the backstab sounds that we hope improve reliability of those. Hopefully we can get it out to test for you tomorrow to try over the weekend