Feedback ellipsis needs to be vertically centered

[stephendonner]

Description

Feedback ellipsis needs to be vertically centered

Steps to Reproduce

1. install 1.62.51
2. launch Brave
3. click on Leo in the sidebar
4. click Accept and begin
5. load an page
6. click on Summarize this page
7. hover over the response
8. look at the alignment

Actual result:

Expected result:

Reproduces how often:

Brave version (brave://version info)

Brave | 1.62.51 Chromium: 119.0.6045.134 (Official Build) nightly (x86_64)
-- | --
Revision | 065f85bcfbc633e8e0bc4764c7bd880748731293
OS | macOS Version 11.7.10 (Build 20G1427)

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the nightly channel?

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

cc @nullhook @aguscruiz @petemill @MadhaviSeelam @srirambv

[fallaciousreasoning]

FWIW @nullhook I think if we put a Nala button with the folowing styles in the anchor-content slot things should look right:

<Button slot="anchor-content" kind='outline' fab size='small'>
  <Icon name='more-horizontal' />
</Button>

it'll have the bonus of being keyboard focusable (though I think still only when you're hovering over the response, which isn't super helpful)

[stephendonner]

For QA: latest nightly and beyond is actually a horizontal line due to #34124 (but still suffers from the same issue; just noting so folks don't get confused when verifying).

[stephendonner]

Verified PASSED using

Brave | 1.62.69 Chromium: 119.0.6045.163 (Official Build) nightly (x86_64)
-- | --
Revision | 271270f8302c71e63d6cca16eee5578836d3fd96
OS | macOS Version 14.2 (Build 23C5047e)

Followed my original steps to reproduce

Confirmed the horizontal ... ellipsis is now vertically centered

Dark

default state	hover	click

Light

default state	hover	click

[LaurenWags]

@nullhook @rebron could one of you please add release-notes/exclude or release-notes/include label as appropriate for this one? Thanks!