Clarify the behaviour of Notification watch switches

[lucaa]

@surli

So just to be a bit more precise: we should not forget that some notifications are not about locations: they can target directly groups or users, some for some event types the location watch is not used at all. But I admit it’s rare, and in general when events targets people it means you really want them to receive the notifications.

Yeah, I know about that, but to me this kind of notif is for a usecase that I call “the system knows better” - which means that the wiki will determine that this event is interesting for this user beyond what the user has expressed (which is why targeted events are not restricted to followed locations), and in that case you probably really want them to receive the notif.

@surli

My only concern now is about the backward compatibility of such behaviour change: I don’t think it would be really a problem for upgrades since it won’t impact users having already specific settings, now it could be surprising for administrators that have habits using old version of XWiki.

Yeah, it’s true that it has backwards compat impact which in principle is a bad thing, but as I said above, if anyone is relying on those defaults it means they understand them which means someone has managed to find meaning in chaos. I want to meet those people, let’s break the compatibility so that they come complain on the forum so that I meet them and express my admiration .