[Bug] Fix configure of non-serializable widget (#921)

Follow up on https://github.com/Comfy-Org/litegraph.js/pull/915

Filter out non-serializable widgets during node configuration. Current
usage in frontend should not be affected as preview media widgets are
mostly dynamically added at the end of widget list.

src/LGraphNode.ts

@@ -731,8 +731,9 @@ export class LGraphNode implements Positionable, IPinnable, IColorable {
       }
 
       if (info.widgets_values) {
+        const widgetsWithValue = this.widgets.filter(w => w.serialize !== false)
         for (let i = 0; i < info.widgets_values.length; ++i) {
-          const widget = this.widgets[i]
+          const widget = widgetsWithValue[i]
           if (widget) {
             widget.value = info.widgets_values[i]
           }