recorder: add missing await

not strictly necessary, but prevents future out-of-order bugs

Author: bobrippling

apps/recorder/interface.html

@@ -891,7 +891,7 @@ <h2>Settings</h2>
 
             switch(task) {
               case "delete":
-                confirmDelete(button, [filename]);
+                await confirmDelete(button, [filename]);
                 break;
               case "downloadkml":
                 await downloadTracks([filename], track => saveKML(track, `Bangle.js Track ${trackid}`));