[EuiComment] Remove shadow in Amsterdam

[andreadelrio]

Summary

• Removed shadow from EuiComment in Amsterdam for consistency.

• Reduce shadow in the default theme.

Checklist

• Check against all themes for compatibility in both light and dark modes
• Checked in mobile
• Checked in Chrome, Safari, Edge, and Firefox
  - [ ] Props have proper autodocs
  - [ ] Added documentation
  - [ ] Checked Code Sandbox works for the any docs examples
  - [ ] Added or updated jest tests
  - [ ] Checked for breaking changes and labeled appropriately
  - [ ] Checked for accessibility including keyboard-only and screenreader modes
• A changelog entry exists and is marked appropriately

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_4321/

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_4321/

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_4321/

[cchaos]

Looks great to me! Thanks for making that change.

One thing I noticed when I was comparing to the default theme is that maybe the current box-shadow is a bit too deep for a list of comments.

What do you think about switching it to use the slight version of the drop-shadow to better match with EuiPanel?

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_4321/

[andreadelrio]

Looks great to me! Thanks for making that change.

One thing I noticed when I was comparing to the default theme is that maybe the current box-shadow is a bit too deep for a list of comments.

What do you think about switching it to use the slight version of the drop-shadow to better match with EuiPanel?

@cchaos I think that's a good idea! I made the change, I'll merge on green.

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_4321/