minor improvements:

- page titles
- favicon
- background logo

frontend/src/routes/project/Kanban.svelte

@@ -194,6 +194,10 @@
     onMount(load);
 </script>
 
+<svelte:head>
+    <title>Umbrella – {project?.name}</title>
+</svelte:head>
+
 {#if project}
 <h1 onclick={ev => router.navigate(`/project/${project.id}/view`)}>{project.name}</h1>
 {/if}