Ensure Update button is enabled when updating a many relationship

The original array was being modified in the relationship component so
when the data page checked if work was different than doc, it was
always the same.

Fixes #5379

src/routes/console/project-[project]/databases/database-[database]/collection-[collection]/document-[document]/attributes/relationship.svelte

@@ -3,12 +3,12 @@
     import { PaginationInline } from '$lib/components';
     import { SelectSearchItem } from '$lib/elements';
     import { Button, InputSelectSearch, Label } from '$lib/elements/forms';
+    import { preferences } from '$lib/stores/preferences';
     import { sdk } from '$lib/stores/sdk';
     import { Query, type Models } from '@appwrite.io/console';
     import { onMount } from 'svelte';
     import { doc } from '../store';
     import { isRelationshipToMany } from './store';
-    import { preferences } from '$lib/stores/preferences';
 
     export let id: string;
     export let label: string;
@@ -32,7 +32,7 @@
     onMount(async () => {
         if (value) {
             if (isRelationshipToMany(attribute)) {
-                relatedList = value as string[];
+                relatedList = (value as string[]).slice();
             } else {
                 singleRel = value as string;
             }