Original bug title:
mediawiki.notification should show the notification bubble relative to the screen, not to the document
Why this is an issue:
But if you have scrolled-down the page, the notification disappears without being read.
Where is this an issue:
For example, when marking large new pages as patrolled, the patrol link is at the bottom of the page and the message whether patrolling succeeded is not visible to the user. Or at custom gadgets/user scripts.
Bubble shown, no matter of the current scroll position.