message: Group: supported themes
diff: @import '../../styles/constants.css';
  +@import '../../styles/scheme.css';
  +
  +.Group {
  + background: var(--background_content);
  + }
  +
  + .Group__content {
  + color: var(--text_primary);
  + }
  /**
  * iOS
  */
  .Group--ios {
  margin: 10px 0;
  - background-color: #fff;
  position: relative;
  }
  z-index: 1;
  height: 1px;
  content: '';
  - background: var(--separator);
  + background: var(--separator_common);
  }
  .Group--ios::before {
  .Group--android {
  margin: 8px 0;
  - background-color: #fff;
  box-shadow: 0 2px 2px 0 rgba(0, 0, 0, .06), 0 0 2px 0 rgba(0, 0, 0, .03);
  }
  