Improve GnomeKeyring usage (use attribute matching, not tokens)
Apparently using the 'token' from gnomekeyring to locate password items is not recommended. Supposedly we should use attributes and gnomekeyring.find_items[_sync] to find them.
I have patch to fix that in gajim. Been using it for many months now. The problem is that it requires gnome-python-desktop >= 2.18.0. So it does not get lost, I'll attach it here, and Gajim developers can decide when it's OK to depend on 2.18 and apply it then.