Customized Add Block Order

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Quick question to the community -- is anyone already working on a method to reorder blocks in the Add Block menu? Doing a quick sweep through the code/database, adding this capability will take some core changes, so I didn't want to work on this if a project was already in the works.

Followup: if the answer above is "no", is this something the community would be interested in? My plan would be to add an ordering method with the same look/feel of the sitemap ordering (essentially, the same drag-and-drop method). I could tuck this in as a subtab under the Add Functionality tab. Thoughts?

Doki