Sorting in TreeView/Install Base App

[smusku]

Need ability to Sort IPs and Location at same parents based on a Custom field or standard field. More in detail Business use case is: Rank should be taken into account when displaying the IPs : If there is a treeview, display the IPs by rank order under its parent (the parent being another IP, or the location in case there is no parent IP). Then display under the parent but at the end of the list the ones having a null rank.