message: Tweak message action bar position
  This moves the message action bar up slightly to avoid covering message text.
diff: @@ -23,7 +23,7 @@ limitations under the License.
  line-height: 24px;
  border-radius: 4px;
  background: $message-action-bar-bg-color;
  - top: -13px;
  + top: -18px;
  right: 8px;
  user-select: none;
  