consolidate interface and remove copies of code

src/views/StatisticsView.vue

@@ -53,8 +53,10 @@
 <script lang="ts">
 import { SVGRenderer } from "three/examples/jsm/renderers/SVGRenderer.js";
 import { Component, Vue } from "vue-facing-decorator";
+
 import { World } from "@/components/World/World.js";
 import QuickNav from "@/components/QuickNav.vue";
+import { NotificationIface } from "@/constants/app";
 
 interface RendererSVGType {
   domElement: Element;
@@ -64,16 +66,9 @@ interface Dictionary<T> {
   [key: string]: T;
 }
 
-interface Notification {
-  group: string;
-  type: string;
-  title: string;
-  text: string;
-}
-
 @Component({ components: { World, QuickNav } })
 export default class StatisticsView extends Vue {
-  $notify!: (notification: Notification, timeout?: number) => void;
+  $notify!: (notification: NotificationIface, timeout?: number) => void;
 
   world: World;
   worldProperties: Dictionary<number> = {};