BTW if you like the Highlight changed properties enhancement then Star or comment on the Chrome Devtools issue 441374. The patch is being reviewed at the moment and hopefully the enhancement will become available in Chrome Browser soon.
NOTE: Now the Highlight changed properties enhancement is coded as an experiment. You will have to turn on the behavior by selecting the Setting (Gear) > Experiments > Highligh changed properties checkbox.
Make sure to load this devtools:
URL in Chrome Devtools App,