Fix picker image meta for MG

picker-filters.php

/**
 * After attachment has been created, make sure to 
 * label it as an external image source so the URL can be re-written.
 */
add_filter( 'capi_image_attachment_meta', function( $metadata, $attachment_id ) {

	// Mark as external image source.
	update_post_meta( $attachment_id, '_external_image_source', 1 );

	return $metadata;
}, 10, 2 );

/**
 * Set both `url` and `file` bits to original resource URL instead of WP asset. 
 */
add_filter( 'capi_image_upload_bits', function( $upload, $post_id, $url ) {

	$upload['url'] = $url;
	$upload['file'] = $url;

	return $upload;
}, 10, 3 );