Don't hide notification popup when scrolling
Don't hide notification popup when scrolling

hideWhenOutOfView is for preventing popups from appearing
outside their container, but in this case the container
is the document, so it is already clipped.

Bug: T178384
Change-Id: Ie0cd83849446cf74b61e708f0a1fa79f2384a94a

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo