Fix styling on "sort by" select on articles page

[John-Paul-Larkin]

Context

We recently integrated the Catalyst component library into the project. However, the global styles in globals.css were conflicting with the new input components. To resolve this, PR #1042 was implemented, scoping the old styles under the "old-input" class. While this successfully fixed the issue on the settings page and editor, it inadvertently affected the styling of the "sort by" dropdown on the articles page.

Expected Behavior

The "sort by" dropdown on the articles page should retain its original styling, unaffected by the changes introduced in PR #1042

Screenshots

Additional info

The articles page can be found at :
app/(app)/articles

[nawinsharma]

@John-Paul-Larkin can you assign me?

[John-Paul-Larkin]

Thanks NawinKumarSharma.
I assigned you.