display node item count 

item_count can be passed in for each node on initial data load. Each node with a item_count > 0 will be shown as a string next to the node name. max_item_count has been added to core settings to prevents unintended long character strings. I.e., if max_item_count == 99 and node items (and sub-node items) add up to 100, the string displayed will be 99+.