This currently uses a gross hack where it subtracts 11px from the
previous sibling bottom to calculate its top. This should be fixed
by switching to a proper two-phase line layouting model, were we
first distribute inline elements into lines and figure out their
horizontal positions and heights; then compute the needed line
heights and position inline elements there vertically.
LayoutBlock::inline_wrapper() is supposed to return an inline wrapper,
a special anonymous block element intended to wrap inline children of
a block element that also has block children. Add a check for whether
the existing block child element is anonymous (refers to a DOM node),
and if it's not create a new anonymous wrapper.
Instead of LibGUI and WindowServer building their own copies of the drawing
and graphics code, let's it in a separate LibDraw library.
This avoids building the code twice, and will encourage better separation
of concerns. :^)
