message: hide timestamp while editing
diff: @@ -76,6 +76,10 @@ limitations under the License.
  }
  }
  +.mx_EventTile_isEditing .mx_MessageTimestamp {
  + visibility: hidden !important;
  +}
  +
  .mx_EventTile .mx_MessageTimestamp {
  display: block;
  visibility: hidden;
  