message: always hide overflow on RoomList in case Layout screws up
diff: @@ -19,9 +19,11 @@ limitations under the License.
  /* take up remaining space below TopLeftMenu */
  flex: 1;
  min-height: 0;
  + overflow-y: hidden;
  }
  .mx_RoomList .mx_ResizeHandle {
  + // needed so the z-index takes effect
  position: relative;
  }
  