Help/About: Allow "See everything new" button to wrap

[ryelle]

On some screen sizes and languages, the "See everything new" button expands out of the content area. This change allows the button to wrap at all screen sizes.

This pulls CSS from both #7769 and #7771, the changes I made were to fix some padding, and apply to all screen sizes.

Trac ticket: https://core.trac.wordpress.org/ticket/62380

Screenshots

	1200px	800px	400px
English
French
Japanese
Uighur (RTL)

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[github-actions]

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Props ryelle, audrasjb.

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[github-actions]

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[audrasjb]

Thanks @ryelle I can confirm this changeset solves the issue in fr_FR 👍
5e479dce-183e-4086-aaff-a6294403d8d3.webm