Feature request: custom branding as a multisite option

[oldfieldtc]

For multisites, would it be possible to change the 'Custom WordPress login branding' option to be a multisite option instead of being per individual site? We've got a lot of sites under our multisite and it would be a huge help if I could change the branding in one place rather than set the option on every site!

Thanks

[figureone]

Would it be ok to add a filter to specify which branding option to choose, and that would override whatever is set in Authorizer settings on the individual subsites? Something like:

add_filter( 'authorizer_set_branding_option', function ( $branding_value, $branding_options ) {
	// Make sure the custom branding option exists in the list of branding options
	// before using it.
	if ( ! empty( array_filter( $branding_options, function( $branding_option ) { return ! empty( $branding_option['value'] ) && 'your-global-branding-option' === $branding_option['value']; } ) ) ) {
		$branding_value = 'your-global-branding-option';
	}

	return $branding_value;
} );

We can also add a wp-config.php constant, something like AUTHORIZER_BRANDING_OPTION that would do the same.

I think that's easier for us to implement instead of trying to handle folks that want custom branding on each subsite vs. consistent branding across all subsites.

[oldfieldtc]

That could work! Happy to test this out if this gets added to a branch