fix binding group order bug (revealed by previous commit, but exists separately from it)

packages/svelte/src/internal/client/dom/elements/bindings/input.js

@@ -1,5 +1,5 @@
 import { DEV } from 'esm-env';
-import { render_effect } from '../../../reactivity/effects.js';
+import { render_effect, user_effect } from '../../../reactivity/effects.js';
 import { stringify } from '../../../render.js';
 
 /**
@@ -96,6 +96,11 @@ export function bind_group(inputs, group_index, input, get_value, update) {
 		}
 	});
 
+	user_effect(() => {
+		// necessary to maintain binding group order in all insertion scenarios. TODO optimise
+		binding_group.sort((a, b) => (a.compareDocumentPosition(b) === 4 ? -1 : 1));
+	});
+
 	render_effect(() => {
 		return () => {
 			var index = binding_group.indexOf(input);