Hi!
I will leave this here. I know Alex will see it one day.
So we have Theme Options, Templates and Global Blocks. All of these already have nice SVG icons inside the ui
file.
I often pin those pages to the browser in separate tabs, when intensely working on new websites. I imagine many others do the same.
It would be a very nice touch if those icons were also favicons specific for those pages, so they can easily be identified while pinned.