Vertically align content in admin table

[contolini]

Align content in admin tables to the top of cells (except the final "children" cells so that the arrow/plus icons stay centered).

Changes

• Align admin content to top of cells.

Screenshots

Before:

After:

Notes

• Wagtail core hardcodes vertical alignment in the templates instead of using CSS. CSS seems preferable.

Checklist

• PR has an informative and human-readable title
• Changes are limited to a single goal (no scope creep)
• Code can be automatically merged (no conflicts)
• Code follows the standards laid out in the development playbook
• Passes all existing automated tests
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future todos are captured in comments
• Visually tested in supported browsers and devices (see checklist below 👇)
• Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)
• Reviewers requested with the Reviewers tool ➡️

[willbarton]

Wagtail core hardcodes vertical alignment in the templates instead of using CSS. CSS seems preferable.

I prefer it!