leaflet: Start the child transition only when folded
This avoids starting the transition when unfolded, which doesn't make sense as all children are visible.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this page for instructions on how to get full permissions. Sorry for the inconvenience.
source.puri.sm will be down starting March 18, 6:00 UTC, for a server migration. We expect the migration to take up to 4 hours.
This avoids starting the transition when unfolded, which doesn't make sense as all children are visible.