Bug#698336: gnome-packagekit should have an easy way to add new sources

[Jeremy Bicha]

Control: tags -1 patch

Here's a patch to have gnome-packagekit use software-properties-gtk to
edit repositories since that's what's being done in gnome-software
3.22.1-1.

This change was made earlier in Ubuntu 16.10.

Thanks,
Jeremy Bicha

0006-Use-software-properties-gtk.patch
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