Person/Team branch listing should be *visually* grouped by project

Notes during call:

Select id, product, distro, sourcepackage, last_modified from Branch where owner is %s

Sort that in python into namespace buckets taking most recent 5 from each bucket, and remembering bucket branch count.

Use the most recent branch ids to do a full Branch object creation for those to make the page.

Issues:
~vcs-imports - agree to special case, redirect to +branches (normal listing)
 - use something like "if pathalogical_branch_listings(owner): premanent redirect to normal branch listing"
 - use a config in pathalogical_branch_listings function to give flexability

So the proposed implementaiton won't work (will timeout - cannot do in-python processing to batch/limit like this).

This needs a rationale/explanation - whats wrong/wrong we are improving etc (it isn't currently a bug report, more a work item in an unknown and undocumented project :P).

I'm going to mark this as incomplete for now, until we get this information, when we can triage it.

[Expired for Launchpad itself because there has been no activity for 60 days.]