CSS: Add padding to labels in media filter container

[Infinite-Null]

https://core.trac.wordpress.org/ticket/65300

What

Added a 6px top margin to align with the media modal and maintain visual consistency.

[github-actions]

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[github-actions]

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[t-hamano]

Thanks for the PR. However, the attached screenshot does not match my local trunk branch.

First, the media library itself lacks visual labels in the first place:

Furthermore, the .media-frame.mode-grid .media-toolbar selector should not apply to the media library launched in the block editor.

Could you test again if this PR is correct?

[masteradhoc]

@Infinite-Null Thank you very much for the PR. i can confirm the findings of @t-hamano.

The media library looks fine without this PR:

With this PR it looks misaligned:

--

As we'll the author reported the labels to be too close together - specifically at the select or upload media screen (right @deeppatel8950?)

This hasnt been fixed yet. Can you take a look at this?
If you dont have time currently no worries! Feel free to close this PR.