Re: What about "extinguish" do you not understand?
Totally agree...I only found it there because when I noticed them disappearing, I searched online and had the exact same WTF...? moment as you did.
For me, it's a stupid design decision in both cases. Firstly, leave it on by default and secondly, put them in...oh I don't know...somewhere else....if only there was a Display section of Settings? </sarcams>