Fix not found and loading error screens

Signed-off-by: Rūdolfs Ošiņš <rudolfs@osins.org>

src/components/LoadError.svelte

@@ -1,10 +1,9 @@
 <script lang="ts">
   import { twemoji } from "@app/lib/utils";
 
-  import Button from "@app/components/Button.svelte";
   import ErrorMessage from "@app/components/ErrorMessage.svelte";
 
-  export let title: string | undefined = undefined;
+  export let title: string;
   export let errorMessage: string;
   export let stackTrace: string;
 </script>
@@ -22,15 +21,9 @@
 
 <div class="wrapper layout-centered">
   <div class="emoji" use:twemoji>🏜️</div>
-  {#if title}
-    <div class="title txt-medium txt-bold txt-highlight">
-      {title}
-    </div>
-  {/if}
-  <ErrorMessage message={errorMessage} {stackTrace} />
-  <div style:margin-top="1rem">
-    <Button variant="foreground" on:click={() => window.history.back()}>
-      Back
-    </Button>
+  <div class="title txt-medium txt-bold txt-highlight">
+    {title}
   </div>
+
+  <ErrorMessage message={errorMessage} {stackTrace} />
 </div>