Redesigned page to update site logos. `AdminBrandingLogoFormComponent`
is attached to the old logos page and the new branding page. In the next
steps, branding will replace the logos page.
A new `AdminConfigAreaCardSection` component was added hidden and less
frequently used settings.
An image placeholder was also needed because many additional logos have
a fallback to the site logo.
Finally, `twitter_summary_large_image` was renamed to
`x_summary_large_image`.
Desktop
Mobile
