message: Render disabled mxField textareas as disabled
  Fixes
diff: @@ -112,7 +112,9 @@ limitations under the License.
  }
  .mx_Field select:disabled,
  -.mx_Field input:disabled {
  +.mx_Field input:disabled,
  +.mx_Field textarea:disabled,
  +.mx_Field textarea:disabled + label {
  background-color: $field-focused-label-bg-color;
  color: $greyed-fg-color;
  }
  