fix(web): adjust button size in person side panel

[lukashass]

Description

Fixes button sizes. See screenshots.

How Has This Been Tested?

• Manual test

Screenshots (if appropriate)

before	after

Checklist:

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if applicable
• I have no unrelated changes in the PR.
• I have confirmed that any new dependencies are strictly necessary.
• I have written tests for new code (if applicable)
• I have followed naming conventions/patterns in the surrounding code
• All code in src/services/ uses repositories implementations for database calls, filesystem operations, etc.
• All code in src/repositories/ is pretty basic/simple and does not have any immich specific logic (that belongs in src/services/)

[jrasm91]

Is there a reason that not all of the buttons have shape="round"? I feel like that would look better, personally.

[lukashass]

Is there a reason that not all of the buttons have shape="round"? I feel like that would look better, personally.

Looks like it was just missing, added it and also increased the unassigned-icon size to match the buttons.