Use the full name of the node as the id in tree view.

src/tree_view.rs

@@ -22,7 +22,7 @@ pub struct TreeView {
 
 #[derive(Clone, Serialize, Deserialize)]
 struct TreeViewNode {
-    id: usize,
+    id: String,
     status: DiagnosticStatus,
     children: Vec<TreeViewNode>,
 }
@@ -39,7 +39,7 @@ impl TreeView {
         for child in children {
             let status = graph.value_of(&child)?;
             let node = TreeViewNode {
-                id: child.clone(),
+                id: graph.full_name_from_key(&child)?,
                 status: status,
                 children: Self::get_nodes(&child, &graph)?,
             };