Fix wrong size propogation for absolute elements

[Lutetium-Vanadium]

Objective

Fixes #876.

Context

From comparing the debug logs between having the container absolute vs in-flow, I noticed that the final_layout_pass was getting no known parent width for absolute but not for in-flow.

Feedback wanted

• I'm not super familiar with the CSS spec so I'm not sure if this is correct or there is some state that needs to be corrected at a different time.
• I think there might be a way to remove the duplicate computation by changing the node_inner_size after determine_container_cross_size, but again not familiar with the CSS spec and its under constants so I didn't change it.

[nicoburns]

Hello, and thanks for the PR!

The core idea here looks correct to me (and the Flexbox test backs that up). A couple of comments:

• I notice you've modified both Flexbox and Block layout, but there is only a test for Flexbox layout. Could you add a test for Block layout too please?
• Relatedly, Grid layout doesn't have either a test or a fix. Could get a test for Grid layout (and if the test reveals it requires the fix, also the fix)

[Lutetium-Vanadium]

Hi, thanks for the feedback. I added the changes you requested. Hope the grid implementation is correct

[nicoburns]

Looks good now - thanks!