gtk: Fix listbox clear loops Re-read firstChild after each removal instead of caching the next sibling, which broke the WidgetRef-to-Widget snapshot and left a stale pointer when a header func regenerates neighbours.
gtk: Fix listbox clear loops Re-read firstChild after each removal instead of caching the next sibling, which broke the WidgetRef-to-Widget snapshot and left a stale pointer when a header func regenerates neighbours.