Admin reskin: Fix vertical alignment of pagination input in list tables.

[rbcorrales]

The page number input in WP_List_Table pagination was vertically misaligned with the navigation buttons due to different baseline positions.

The fix adds vertical-align: top to .current-page, which aligns the input flush with the buttons without side effects on the bottom pagination row (which has no input field).

Before:

After:

For additional context, other approaches explored and discarded:

• display: flex + align-items: center on the pagination containers fixed alignment but changed horizontal spacing and affected the bottom pagination row.
• vertical-align: middle on buttons and text elements fixed the top row but shifted the bottom pagination which was already aligned.

Trac ticket: https://core.trac.wordpress.org/ticket/64975

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Opus 4.6
Used for: Measuring computed styles in the browser and code reviewing. Final fix validated and reviewed by me.

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[github-actions]

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[github-actions]

A commit was made that fixes the Trac ticket referenced in the description of this pull request.

SVN changeset: 62182
GitHub commit: a6d9020

This PR will be closed, but please confirm the accuracy of this and reopen if there is more work to be done.