I'm happy to say, there are people engaged with QA already :)
I am particularly pushing the apps I maintain towards proper testing and quality assurance (see e.g. the Contribute page of GNOME To Do)
If anyone from this community steps up, installs the Flatpak Nightly version of any app, and start testing, you call yourself a contributor already. It is really that simple :)
Anybody know the name of the Gnome ToDo package. I see it listed in the AUR as gnome-todo, but not in the core repo like other gnome core apps. Could it because it was just introduced as a preview app for Gnome 3.18?
Are you talking about this: https://wiki.gnome.org/Apps/Todo ?
The new GNOME integration uses the same mechanisms as the DAV bridge, so if one doesn't work, so won't the other. Though both of them should work.
I've asked the GNOME developers about it, let's see what they say.
Edit: I briefly checked the source code, and it looks like it should. Are you sure the DAV bridge doesn't work? Maybe something special needs to be done? Maybe we can ask the GNOME devs.