Issue #3210759 by gausarts, jlstrecker, aminorking: Generated SVG placeholder...

Blazy 8.x-2.0-dev, 2022-03-26

-----------------------------

- Issue #3210759 by gausarts, jlstrecker, aminorking: Generated SVG placeholder

  dimensions are not using the responsive image style dimensions.

- Prioritized custom Placeholder ('/blank.svg') to fix for Views rewrite

  results to override Responsive image `data:image` which causes 404.

- Prevents double-downloading the fallback image, enforced since 2.10, to

              // @todo use dimensions based on the chosen fallback.

              if ($uri && $style = $blazy->entityLoad($id, 'image_style')) {

                $data_src = BlazyFile::transformRelative($uri, $style);

                [

                  'width' => $width,

                  'height' => $height,

                ] = BlazyImage::transformDimensions($style, $settings);

                $placeholder = Placeholder::generate($width, $height);

              }

            }

          }