Global styles sidebar: Post terms, post navigation, and query title are missing icons

[carolinan]

Description

In the global styles sidebar in the site editor, these blocks are missing their custom icons. Instead, the "lego brick" is shown:
Post terms, post navigation, and query title.

Step-by-step reproduction instructions

1. Activate a theme with support for full site editing
2. Go to Appearance > Editor
3. Open styles
4. Select Blocks
5. In the list of blocks, see the icons.

Screenshots, screen recording, code snippet

Environment info

WordPress 5.9-beta3-52379-src
With and without Gutenberg trunk

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes

[carolinan]

Perhaps the real question is if these blocks should be visible here or if their variations should be used?
(Archive title, next/previous, post categories, post tags)

[carolinan]

Do you have any thoughts on this issue @jasmussen?

[jasmussen]

Good ticket, thank you. It seems like the mini-icon with two rows of text below pattern used for the other related icons (post title, post excerpt etc) might work well here also. @javierarce since you created that excellent submenu icon yesterday, is this something you'd like to take a stab at? Otherwise I have some bandwidth to tackle this next week.

[javierarce]

@jasmussen please, go for it if you have the time, I'm a bit swamped with work right now.

[jasmussen]

Awesome, I'll take a stab, no worries 👌

[jasmussen]

Took a stab in #38521. Note I wasn't able to find the "Post Navigation Link" to insert, and it's unclear to me what it does. Can we just use the existing Pagination icon for it?