[PATCH] models: Add a backreference for a user's bundles

[Stephen Finucane]

On Thu, 2018-04-12 at 13:01 +0100, Stephen Finucane wrote:
> This is more intuitive.
> 
> Signed-off-by: Stephen Finucane <stephen at that.guru>

There were some minor fixes needed but this is now applied.

Stephen