Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  8f4b0103fa2f32a8097c1aa837ba38f4192dba76

Consolidate and clean up "scroll to this element" code

Previously we've scrolled the top of the element to the middle of the screen
and hoped for the best. This patch refactors it to use One True Scroll Method
from core, which does the minimum amount of scrolling to bring as much of the
element as possible wholly into view, horizontally *and* vertically.

Since the core plugin is not yet merged, this patch has a copy of the plugin
which is used if the core plugin is not available.

Bug: 56789
Change-Id: I55a4ee7992126a4d2b3ebdae1f94cbf91c431719