Apply patch to allow svg uploads for logo

Closes #2259567 Apply patch from issue #2259567 comment #179

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• 52a2d263 - Test update

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Commenting here to highlight this question: do we want to add this attribute here? The more permissions it's added to the less meaningful it becomes.

Not sure I fully follow but agree with @catch comment that allowing access to the themes can completely break a site. So restricting makes sense to me.