message: header should never grow or shrink
diff: @@ -15,7 +15,8 @@ limitations under the License.
  */
  .mx_RoomSubList {
  - flex: 0;
  + min-height: 31px;
  + flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  }
  @@ -25,10 +26,10 @@ limitations under the License.
  flex: 1;
  }
  -
  .mx_RoomSubList_labelContainer {
  display: flex;
  flex-direction: row;
  + flex: 0 0 auto;
  }
  .mx_RoomSubList_label {
  