Previously, the `|=` would not compare strings containing `-`
characters correctly because it would only compare the element
attribute up to the first `-` character.
positioned element is a descendant of inline-block
Sets inline block offsets in InlineFormattingContext.cpp, but this is
not enough. When static position rect is calculated during layout,
not all ancestors of abspos box may have their offsets calculated yet
(more info here: https://github.com/LadybirdBrowser/ladybird/pull/2583#issuecomment-2507140272).
So now static position rect is calculated relative to static containing
block during layout and calculation relative to actual containing block
is done later in
FormattingContext::layout_absolutely_positioned_element.
Fixes wpt/css/CSS2/abspos/static-inside-inline-block.html
Before this change, we were always processing all row groups first,
and then all rows. This led to incorrect table layouts when rows and row
groups were encountered in anything but that order.
This fixes an issue where `vertical-align: middle` would incorrectly
shift the text away from the natural alphabetic baseline.
Fixing this makes many WPT table tests work correctly, so I'm also
importing one of them here. :^)
