message: PanelHeaderSimple: added visor property, fixed addon left margin
diff: position: relative;
  }
  +.PanelHeaderSimple::before {
  + display: block;
  + content: '';
  +}
  +
  +.PanelHeaderSimple--no-visor::before {
  + content: none;
  +}
  +
  .FixedLayout.PanelHeaderSimple__fixed {
  z-index: 10;
  }
  top: calc(var(--panelheader_height_ios) + var(--safe-area-inset-top));
  }
  -.PanelHeaderSimple--ios .PanelHeaderSimple__height,
  +.PanelHeaderSimple--ios::before,
  .PanelHeaderSimple--ios .PanelHeaderSimple__in {
  height: var(--panelheader_height_ios);
  padding-top: var(--safe-area-inset-top);
  padding-left: 16px;
  }
  +.PanelHeaderSimple--ios .PanelHeaderSimple__addon {
  + margin-left: 2px;
  +}
  +
  .PanelHeaderSimple--ios .PanelHeaderSimple__content {
  font-weight: 800;
  font-family: var(--font-tt);
  top: calc(var(--panelheader_height_android) + var(--safe-area-inset-top));
  }
  -.PanelHeaderSimple--android .PanelHeaderSimple__height,
  +.PanelHeaderSimple--android::before,
  .PanelHeaderSimple--android .PanelHeaderSimple__in {
  height: var(--panelheader_height_android);
  padding-top: var(--safe-area-inset-top);
  