🐛 fix external links in sidemenu (#1720)

* fix admin link clickability

* fix bug when there are unsaved changes

packages/editor-ui/src/components/MainSidebarMenuItemsIterator.vue

@@ -0,0 +1,44 @@
+<template>
+	<div>
+		<el-menu-item
+			v-for="item in items"
+			:key="item.id"
+			:index="item.id"
+			@click="onClick(item)"
+		>
+			<font-awesome-icon :icon="item.properties.icon" />
+			<span slot="title" :class="{'item-title-root': root, 'item-title': !root}">{{ item.properties.title }}</span>
+		</el-menu-item>
+	</div>
+</template>
+
+<script lang="ts">
+
+import { IMenuItem } from '../Interface';
+import Vue from 'vue';
+
+export default Vue.extend({
+	name: 'MenuItemsIterator',
+	props: [
+		'items',
+		'root',
+	],
+	methods: {
+		onClick(item: IMenuItem) {
+			if (item && item.type === 'link' && item.properties) {
+				const href = item.properties.href;
+				if (!href) {
+					return;
+				}
+
+				if (item.properties.newWindow) {
+					window.open(href);
+				}
+				else {
+					window.location.assign(item.properties.href);
+				}
+			}
+		},
+	},
+});
+</script>