message: Decrease margin between new sublists
  This is an attempt to increase density without adjusting the tiles directly.
diff: @@ -22,10 +22,12 @@ limitations under the License.
  flex-direction: column;
  margin-left: 8px;
  - margin-top: 12px;
  - margin-bottom: 12px;
  width: 100%;
  + &:first-child {
  + margin-top: 12px; // so we're not up against the search/filter
  + }
  +
  .mx_RoomSublist2_headerContainer {
  // Create a flexbox to make alignment easy
  display: flex;
  