message: fixed subheader left button style
diff: .left-icon {
  @extend .q-icon;
  height: 100%;
  - padding: 10px;
  display: flex;
  top: 0;
  align-items: center;
  position: absolute;
  - left: 10px;
  + left: 20px;
  justify-content: space-between;
  }
  