@redmunds @lkcampbell
Independent of the thread above, I wonder if we should consider relabeling this.  "User Extensions" seems easy to misinterpret as referring to the "extensions/user" folder, which is wrong since this command also affects the "src/extensions/dev" folder.

I think we should simply say "Extensions" in these strings -- as far as most users are concerned, the only "extensions" that exist are the ones that show up in Extension Manager.  The average end user has no idea that, as an implementation detail, certain non-optional core functionality happens to be structured as extensions too.  So I think we may be trying to parse hairs more than needed in the labels here.