message: Add comment to specify variable origin
diff: @@ -39,6 +39,7 @@ limitations under the License.
  .mx_Waveform_bar {
  background-color: $voice-record-waveform-incomplete-fg-color;
  height: 100%;
  + /* Variable set by a JS component */
  transform: scaleY(max(0.05, var(--barHeight)));
  &.mx_Waveform_bar_100pct {
  