Svelte NodeToolbar with E2E (#3643)

* Added NodeToolbar

* Added comments & fixed default behaviour in svelte

* Added e2e-tests for NodeToolbar component & added data-id to react NodeToolbar

* refactor(svelte/NodeToolbar): cleanup

* refactor(node-toolbar): add system utils

---------

Co-authored-by: moklick <info@moritzklack.com>

packages/svelte/src/lib/components/EdgeLabelRenderer/EdgeLabelRenderer.svelte

@@ -1,9 +1,12 @@
 <script lang="ts">
   import portal from '$lib/actions/portal';
+  import { useStore } from '$lib/store';
 
   type $$Props = {};
+
+  const { domNode } = useStore();
 </script>
 
-<div use:portal={'.svelte-flow__edgelabel-renderer'}>
+<div use:portal={{ target: '.svelte-flow__edgelabel-renderer', domNode: $domNode }}>
   <slot />
 </div>