Add support for a border below section headers in Sidebar and Panel #157344
+19
−1
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This fixes #157343
Eg:

It allows for a border to be places below section headers.
In the screenshots above, I have added the border manually in settings.json. This is default to null for all themes since I wasn't sure how it would look with the high contrast themes when I was creating it, but looking at the screenshot above, I think you could make a case for enabling it.