message: fix top offset for internal webview type
diff: }
  @media (max-height: 720px) {
  - .ModalRoot--ios .ModalPage--desktop .ModalPage__in {
  - max-height: calc(100vh - var(--safe-area-inset-top));
  - }
  -
  - .ModalRoot--vkapps.ModalRoot--android .ModalPage--desktop .ModalPage__in,
  - .ModalRoot--vkapps.ModalRoot--vkcom .ModalPage--desktop .ModalPage__in {
  - max-height: calc(100vh - var(--panelheader_height_android));
  - }
  -
  - .ModalRoot--vkapps.ModalRoot--ios .ModalPage__in {
  - max-height: calc(100vh - var(--safe-area-inset-top) - var(--panelheader_height_ios));
  + .ModalPage--desktop .ModalPage__in {
  + max-height: calc(100vh - 64px);
  }
  }
  