message: Fix breadcrumbs overflowing left-panel
diff: @@ -50,6 +50,7 @@ $roomListCollapsedWidth: 68px;
  contain: content;
  position: relative;
  flex-grow: 1;
  + overflow: hidden;
  // Note: The 'room list' in this context is actually everything that isn't the tag
  // panel, such as the menu options, breadcrumbs, filtering, etc
  