Hide the side bar when no icon is selected

src/SideBar.svelte

@@ -27,7 +27,7 @@
 			/>
 		{/each}
 	</div>
-	<div class="shrink-0 w-52 h-full z-10 p-5 bg-neutral-600 text-gray-100">
+	<div class="shrink-0 w-52 h-full z-10 p-5 bg-neutral-600 text-gray-100" class:hidden={!activeInfo}>
 		{activeInfo}
 	</div>
 </div>