adding double click features

frontend/assets/js/app.js

@@ -1417,9 +1417,9 @@ function onDblClick(e) {
     const mx = e.clientX - rect.left - panX;
     const my = e.clientY - rect.top - panY;
     const node = getCanvasNodeAt(mx, my);
-    if (node) { selectNode(node.id); return; }
+    if (node) { editSelectedNode(node.id); return; }
     const shape = getShapeAt(mx, my);
-    if (shape) { selectedNodeId = null; selectedShapeId = shape.id; renderShapeList(); renderNetwork(); }
+    if (shape) { editSelectedShape(shape.id); }
 }
 
 function esc(s) {