filter not delegated patches

[Thomas Monjalon]

Hi,

I was using a very convenient feature in the old patchwork that
I cannot find in the version 1.1:

In the filter box, the delegate field can be filled on completion only.
It would be more convenient to list the possible values in the drop-down
(i.e. people who had some patches delegated to them) but it is not really
my issue.
More importantly, I would like to be able to find the patches which are
not delegated at all. Is there a way to do this please?

I guess it is related to the call $('#delegate_input').selectize() in
patchwork/templates/patchwork/filters.html and in patchwork/filters.py?
Is allowEmptyOption of selectize to be considered?
There is also a bug entry for this option:
	https://github.com/selectize/selectize.js/issues/739

Thanks