link to public dashboard in admin options, add return button do public dashboard

web/frontend/src/DashPublic.root.svelte

@@ -30,6 +30,7 @@
     Table,
     Progress,
     Icon,
+    Button
   } from "@sveltestrap/sveltestrap";
   import Roofline from "./generic/plots/Roofline.svelte";
   import Pie, { colors } from "./generic/plots/Pie.svelte";
@@ -353,6 +354,11 @@
           }}
         />
       </Col>
+      <Col class="d-flex justify-content-end">
+        <Button outline class="mb-1" size="sm" color="light" href="/">
+          <Icon name="x"/>
+        </Button>
+      </Col>
     </Row>
     {#if $statusQuery.fetching || $statesTimed.fetching}
       <Row class="justify-content-center">