message: Add comments to _EventTile.scss
diff: @@ -203,6 +203,7 @@ limitations under the License.
  text-decoration: none;
  }
  +// Explicit relationships so that it doesn't apply to nested EventTile components (e.g in Replies)
  .mx_EventTile_last > div > a > .mx_MessageTimestamp,
  .mx_EventTile:hover > div > a > .mx_MessageTimestamp,
  .mx_EventTile.menu > div > a > .mx_MessageTimestamp {
  @@ -343,6 +344,7 @@ limitations under the License.
  border-left: $e2e-unverified-color 5px solid;
  }
  +// Explicit relationships so that it doesn't apply to nested EventTile components (e.g in Replies)
  .mx_EventTile:hover.mx_EventTile_verified .mx_EventTile_line > a > .mx_MessageTimestamp,
  .mx_EventTile:hover.mx_EventTile_unverified .mx_EventTile_line > a > .mx_MessageTimestamp {
  left: 3px;
  @@ -355,6 +357,7 @@ limitations under the License.
  }
  */
  +// Explicit relationships so that it doesn't apply to nested EventTile components (e.g in Replies)
  .mx_EventTile:hover.mx_EventTile_verified .mx_EventTile_line > .mx_EventTile_e2eIcon,
  .mx_EventTile:hover.mx_EventTile_unverified .mx_EventTile_line > .mx_EventTile_e2eIcon {
  display: block;
  