Further dynamic input fixes (#8026)

- Fix deserialization of matchtype inputs spawned by autogrow.
- Rotate multitype slot indicators to align with design changes.
- Fix several instance of incorrect group matching
- MatchType reactively updates input type in vue
- Support the "hollow circle" optional input indicator in vue
- Custom combo sends index of selection to backend

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8026-Further-dynamic-input-fixes-2e76d73d3650819680fef327a94f4294)
by [Unito](https://www.unito.io)

src/extensions/core/customCombo.ts

@@ -98,6 +98,19 @@ function onNodeCreated(this: LGraphNode) {
       }
     })
   }
+  const widgets = this.widgets!
+  widgets.push({
+    name: 'index',
+    type: 'hidden',
+    get value() {
+      return widgets.slice(2).findIndex((w) => w.value === comboWidget.value)
+    },
+    set value(_) {},
+    draw: () => undefined,
+    computeSize: () => [0, -4],
+    options: { hidden: true },
+    y: 0
+  })
   addOption(this)
 }