Yang VIZ - Enhancement - To provide only a list of nodes relevant to the selected depth level

Repro steps:
1. Load Yang Visualizer > Choose network-topology model > Select 4lvl depth > Click Types view > Click lable "choice"
After clicking on choice label, thre occurs no reaction. The model network-topology contains node type "choice" but this node type is not currently displayed in depth lvl 4. Node type "choice" is displayed when depth level 5 is selected.

SUGGESTION: To provide only the node types that are displayed in currently chosen depth lvl.