message: fix(ImageBase): fix token for background
diff: flex-shrink: 0;
  box-sizing: border-box;
  color: var(--vkui--color_icon_secondary);
  - background-color: var(--vkui--color_background);
  + background-color: var(--vkui--color_background_secondary);
  background-size: cover;
  box-shadow: inset 0 0 0 var(--thin-border)
  var(--vkui--color_image_border_alpha);
  