ui: Multi-column layout within access nodes if no child node has edges

* use multiple columns for access nodes if no child has edges
* try to layout close to a square
* layout neighboring accesses to the width of the largest
* increase threshold to hide children on parent activation to 100
* use square layouting in inheritance trees as well

src/lib/data/storage/PersistentStorage.cpp

@@ -1046,8 +1046,8 @@ std::shared_ptr<Graph> PersistentStorage::getGraphForActiveTokenIds(
 			{
 				m_hierarchyCache.addFirstChildIdsForNodeId(elementId, &nodeIds, &edgeIds);
 
-				// don't expand active node if it has more than 20 child nodes
-				if (nodeIds.size() > 20 && nodeType.isCollapsible())
+				// don't expand active node if it has too many child nodes
+				if (nodeIds.size() > 100 && nodeType.isCollapsible())
 				{
 					nodeIds.clear();
 				}