Try updated font sizes

[kjellr]

This PR changes our font sizes a bit, to align with the upcoming font-size changes in Core, and the work being done in WordPress/gutenberg#37038.

For Twenty Twenty-Two's purposes, we had to rename some of the size slugs: The "Normal" font size can't just be dropped outright since it's the base size used for the entire theme. So I changed that to Medium, and scaled things up from there. Here are the changes:

Old preset sizes:

• Small
• Normal
• Medium
• Large
• Huge

New preset sizes:

• Small
• Medium
• Large
• Extra Large

Changes:

• Small ➡️ (no change)
• Normal ➡️ Medium
• Medium ➡️ Large
• Large ➡️ Extra Large
• Huge ➡️ (custom variable, same name)

[kjellr]

In bd39c49, I realized that we had to change the markup for all the items that used to be "Huge" too. Previously, they were using the is-font-size-huge class, which fell back to the Gutenberg default instead of our custom variable. 😕

I think I sorted that all out, but in any case, this could use a solid review if we move forward with it.

[kjellr]

Ok, while I was here I made some very subtle refinements to the type scale so that it works better responsively.

This is a pretty large PR, but it's mostly find & replace, and I feel pretty confident about it. I'd like to merge this in sooner rather than later so that more folks are able to test it.

[jffng]

To confirm, I should I be seeing just four preset sizes in the typography panel, instead of the previous five:

Left a couple minor comments, once those are addressed I think we can bring this in.

[jffng]

I did notice a bug on trunk which this PR fixes, but it could be an issue for other themes — the normal font size in the editor is being overridden by Gutenberg's default normal font size:

[kjellr]

To confirm, I should I be seeing just four preset sizes in the typography panel, instead of the previous five

Thats right. 👍

I did notice a bug on trunk which this PR fixes, but it could be an issue for other themes — the normal font size in the editor is being overridden by Gutenberg's default normal font size:

I think it was doing that before, right? In any case, I'll leave a note in the corresponding Gutenberg PR to double check.