pygui: avoid saving edge config metadata when values are default

daemon/core/gui/coreclient.py

@@ -582,6 +582,8 @@ class CoreClient:
         # create edges config
         edges_config = []
         for edge in self.links.values():
+            if not edge.is_customized():
+                continue
             edge_config = dict(token=edge.token, width=edge.width, color=edge.color)
             edges_config.append(edge_config)
         edges_config = json.dumps(edges_config)

daemon/core/gui/graph/edges.py

@@ -297,6 +297,9 @@ class CanvasEdge(Edge):
         self.context: tk.Menu = tk.Menu(self.canvas)
         self.create_context()
 
+    def is_customized(self) -> bool:
+        return self.width != EDGE_WIDTH or self.color != EDGE_COLOR
+
     def create_context(self) -> None:
         themes.style_menu(self.context)
         self.context.add_command(label="Configure", command=self.click_configure)