[backport cloud/1.37] Fix asset selection in litegraph (#8119)

Backport of #8117 to `cloud/1.37`

Automatically created by backport workflow.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8119-backport-cloud-1-37-Fix-asset-selection-in-litegraph-2eb6d73d3650811180a1e3f6779b4f60)
by [Unito](https://www.unito.io)

Co-authored-by: AustinMroz <austin@comfy.org>

src/lib/litegraph/src/types/widgets.ts

@@ -55,7 +55,7 @@ interface IWidgetKnobOptions extends IWidgetOptions<number[]> {
 }
 
 export interface IWidgetAssetOptions extends IWidgetOptions {
-  openModal: () => void
+  openModal: (widget: IBaseWidget) => void
 }
 
 /**

src/lib/litegraph/src/widgets/AssetWidget.ts

@@ -53,6 +53,6 @@ export class AssetWidget
 
   override onClick() {
     //Open Modal
-    this.options.openModal()
+    this.options.openModal(this)
   }
 }

src/renderer/extensions/vueNodes/widgets/composables/useComboWidget.ts

@@ -94,7 +94,7 @@ const createAssetBrowserWidget = (
   const displayLabel = currentValue ?? t('widgets.selectModel')
   const assetBrowserDialog = useAssetBrowserDialog()
 
-  async function openModal(this: IBaseWidget) {
+  async function openModal(widget: IBaseWidget) {
     if (!isAssetWidget(widget)) {
       throw new Error(`Expected asset widget but received ${widget.type}`)
     }
@@ -129,7 +129,7 @@ const createAssetBrowserWidget = (
         }
 
         const oldValue = widget.value
-        this.value = validatedFilename.data
+        widget.value = validatedFilename.data
         node.onWidgetChanged?.(
           widget.name,
           validatedFilename.data,