message: fix containment rule to keep height when resizing vertically
diff: @@ -19,7 +19,7 @@ limitations under the License.
  margin-bottom: 4px;
  padding: 4px;
  - contain: strict;
  + contain: content; // Not strict as it will break when resizing a sublist vertically
  height: 40px;
  box-sizing: border-box;
  