This got me curious as we've been using push mode on updates, but as we use Ignition for more things and more people, I've been thinking we may need to switch to notify. If we do that, I'd like to push updates to clients when they are idle. Looks like that can be done with a slight modification to this idea (edit: see this post for solution--below trigger method doesn't work in v7.9.9):
Added this here as it's another approach to forcing client update--from the client end with a script checking for trigger conditions.