[ui] don't show groups unless there are some

webui/src/components/Inspect.svelte

@@ -180,6 +180,7 @@
         <Spinner />
       {/if}
     </h2>
+    {#if groups?.length}
       <section class="groups labelborder">
         <header><h3>Groups</h3></header>
         <div class="content">
@@ -206,6 +207,7 @@
           {/if}
         </div>
       </section>
+    {/if}
   </header>
   <BlobPreview {address} />
   <NotesEditor {address} {editable} on:change={onChange} />