[Backport 1.28] Allow reordering of linked subgraph widgets (#6009)

Manual backport of #5981 to `core/1.28`

Requires minor styling change since theme code will not be backported.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6009-Backport-1-28-Allow-reordering-of-linked-subgraph-widgets-2886d73d36508125a125e8acc8ae08a7)
by [Unito](https://www.unito.io)

src/core/graph/subgraph/proxyWidgetUtils.ts

@@ -11,13 +11,15 @@ import type { IBaseWidget } from '@/lib/litegraph/src/types/widgets.ts'
 import { useLitegraphService } from '@/services/litegraphService'
 import { useSubgraphNavigationStore } from '@/stores/subgraphNavigationStore'
 
-export type WidgetItem = [LGraphNode, IBaseWidget]
+type PartialNode = Pick<LGraphNode, 'title' | 'id' | 'type'>
+
+export type WidgetItem = [PartialNode, IBaseWidget]
 
 function getProxyWidgets(node: SubgraphNode) {
   return parseProxyWidgets(node.properties.proxyWidgets)
 }
 export function promoteWidget(
-  node: LGraphNode,
+  node: PartialNode,
   widget: IBaseWidget,
   parents: SubgraphNode[]
 ) {
@@ -32,7 +34,7 @@ export function promoteWidget(
 }
 
 export function demoteWidget(
-  node: LGraphNode,
+  node: PartialNode,
   widget: IBaseWidget,
   parents: SubgraphNode[]
 ) {