Use node edit dialog to change names of nodes

src/lib.rs

@@ -1,7 +1,7 @@
 use serde::{ Serialize, Deserialize };
 use std::collections::{ HashMap, HashSet };
 
-#[derive(Serialize, Deserialize, Debug, Default)]
+#[derive(Serialize, Deserialize, Debug, Default, Clone)]
 #[serde(default)]
 pub struct Node {
     pub x: f32,