Add button to delete tracks and gongs

ui/src/routes/musiks/tracks/[tid]/+page.svelte

@@ -12,6 +12,14 @@
  } from 'sveltestrap';
 
  import { getTrack } from '$lib/track';
+ import { tracks } from '$lib/stores/tracks';
+
+ function deleteThis(track) {
+     track.delete().then(() => {
+         tracks.refresh();
+         goto('musiks/tracks/');
+     })
+ }
 </script>
 
 {#await getTrack($page.params.tid)}
@@ -37,5 +45,17 @@
                 <span class="text-muted">{track.id}</span>
             </ListGroupItem>
         </ListGroup>
+
+        <ListGroup class="my-2 text-center">
+            <ListGroupItem
+                action
+                tag="button"
+                class="text-danger fw-bold"
+                on:click={() => deleteThis(track)}
+            >
+                <Icon name="trash" />
+                Supprimer cette piste
+            </ListGroupItem>
+        </ListGroup>
     </Container>
 {/await}