Muffle updates to the cursor position to 1/~100ms

[DHowett-MSFT]

This stops us from dispatching back-to-back terminal cursor position
updates to the TSF control before it has a chance to get back to us.

Fixes #5288

This was tested live with the 6MB repro file from "Terminal Not Speed Enough".

[miniksa]

I still wanted it to be named "tuned mass damper" but fine. Let's do this.

[leonMSFT]

Thanks for doing this 😅

[DHowett-MSFT]

We still dispatch about 60 of them printing the entire 6MB file, but that's a 100000000000000000% reduction and the UI remains fully responsive.

[DHowett-MSFT]

Alright, i switched this from a mutex to an atomic -- it's cheaper and the platform cannot deny us.

I also took some measurements. For a .070-second run of trace logging from that 6MB file:

We tried to notify TSF 19798 times, and we successfully notified it 14 times.

We can probably do better than "notify 14 times in 7 hundredths of a second"

changing

[DHowett-MSFT]

After damping, i got it down to 502 cursor updates for the entire file print.

[leonMSFT]

Makes sense to me, seems to muffle harder

[zadjii-msft]

Hey I'm just seeing this now in the morning, but @greg904 had a great little throttle helper over in TimeThrottle.h in #4608 that might be able to be adapted for this to dampen even further