message: Group: simplify css
diff: }
  .Group__description {
  + display: block;
  + padding: 4px 16px 16px;
  color: var(--text_secondary);
  }
  -.Group .Group > .Group__inner {
  - padding-left: 0;
  - padding-right: 0;
  -}
  -
  +.Group .Group > .Group__inner,
  .Group .Group > .Group__separator {
  padding-left: 0;
  padding-right: 0;
  padding-bottom: 0;
  }
  -/* iOS */
  -
  +/**
  + * iOS
  + */
  .Group--ios .Group__description {
  padding: 4px 12px 16px;
  }
  -/* Android & vkcom */
  -
  -.Group--android .Group__description,
  -.Group--vkcom .Group__description {
  - padding: 4px 16px 16px;
  -}
  -
  -/* vkcom */
  -
  +/**
  + * VKCOM
  + */
  .PanelHeader--vkcom ~ .Group--card:first-of-type,
  .PanelHeader--vkcom + * .Group--card:first-of-type {
  position: relative;
  