message: room sublist seems to get rendered w/o _scroll element
  when loading the page from a community url
diff: @@ -38,6 +38,9 @@ class RoomSizer extends Sizer {
  class RoomDistributor extends FixedDistributor {
  resize(itemSize) {
  const scrollItem = this.item.querySelector(".mx_RoomSubList_scroll");
  + if (!scrollItem) {
  + return; //FIXME: happens when starting the page on a community url, taking the safe way out for now
  + }
  const fixedHeight = this.item.offsetHeight - scrollItem.offsetHeight;
  if (itemSize > (fixedHeight + scrollItem.scrollHeight)) {
  super.resize("resized-all");
  