Record and display past score/percentage of symbols in current obj #371

I often find myself having to write down percents and function names to compare if a change improved something and hasn't made it worse elsewhere (such as a inline acting differently than it should)
This is a very annoying interruption in the workflow.

How i see this could be implemented is a optional feature to cache current obj percent/score to a file.

It would read the cache and show the previous percents showing them something like
(current%|prev%) MyFunction.

Previous percent should preferably be shown in either red if worse, green if better.
This would allow quick check of to see how a change that was just made affects the obj