404 back improved.

src/Squidex/app/shell/pages/not-found/not-found-page.component.html

@@ -5,7 +5,10 @@
 
     <h1>Not Found</h1>
 
-    <p>Sorry, the page you are looking for does not exist</p>
+    <p>
+        Sorry, the page or resource you are looking for does not exist. 
+        When you create a new resource, for example an App or Schema it might take some seconds until it is available.
+    </p>
 
-    <a sqxParentLink>Back to Homepage</a>
+    <a href="#" (click)="back()">Back to previous page.</a>
 </div>

src/Squidex/app/shell/pages/not-found/not-found-page.component.ts

@@ -6,10 +6,20 @@
  */
 
 import { Component } from '@angular/core';
+import { Location } from '@angular/common';
 
 @Component({
     selector: 'sqx-not-found-page',
     styleUrls: ['./not-found-page.component.scss'],
     templateUrl: './not-found-page.component.html'
 })
-export class NotFoundPageComponent { }
+export class NotFoundPageComponent {
+    constructor(
+        private readonly location: Location
+    ) {
+    }
+
+    public back() {
+        this.location.back();
+    }
+}