update: Pass down values as props instead of relying on store

* store values are passed down by main vue flow component
* store is only used to emit events or if really necessary in the component
* add keys with store id to elements
*

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

examples/Header.vue

@@ -10,7 +10,7 @@ const onChange = (event: any) => {
 </script>
 <template>
   <header>
-    <a class="logo" href="https://github.com/bcakmakoglu/vue-flow"> Vue VueFlow Dev </a>
+    <a class="logo" href="https://github.com/bcakmakoglu/vue-flow"> Vue Flow Dev </a>
     <select v-model="route.path" @change="onChange">
       <template v-for="r of routes" :key="r.path">
         <option v-if="r.path !== '/'" :value="r.path">