fix(node-toolbar): await target before teleporting to viewport

Signed-off-by: braks <78412429+bcakmakoglu@users.noreply.github.com>

packages/node-toolbar/src/NodeToolbar.vue

@@ -82,7 +82,7 @@ export default {
 </script>
 
 <template>
-  <Teleport :to="viewportRef">
+  <Teleport :to="viewportRef" :disabled="!viewportRef">
     <div v-if="isActive && nodes.length" v-bind="$attrs" :style="wrapperStyle" class="vue-flow__node-toolbar">
       <slot />
     </div>