message: sized items cannot grow, unsized items start with their content size and shrink from there
diff: @@ -33,13 +33,13 @@ limitations under the License.
  .mx_RoomSubList {
  min-height: 31px;
  - flex: 0 10000 auto;
  + flex: 0 10000 content;
  display: flex;
  flex-direction: column;
  }
  .mx_RoomSubList.resized-sized {
  - flex: 1 1 auto;
  + flex: 0 1 0;
  }
  .mx_RoomSubList_nonEmpty {
  