That’s a good thing. … Some time ago I did create a step by step description, how to find out which shadow has been changed and what has been changed. HowTo Compare the Content of a Shadow Tiddler With the Content of an Overwritten Shadow
In post 4 @cskrisz even extended the diff view to show the fields that have been changed. That may be of interest for you.
You only need to keep a link in your “dev-docs” tiddler 
-mario
PS: Once v5.4.0 is out, it may be even easier to find the code, that built your UI with my Devtools plugin, which has an option to open the corresponding source code of a UI element.
Feedback would be very welcome