fix: the spinner by the path takes only its own width

internal/server/web/templates/files.html

@@ -29,7 +29,9 @@
      click on it lists them. It holds its place, hidden or not, so the path
      field beside it never jumps. */
   #uppct:not(:empty) { min-width:9.5ch; }
-  .busy { flex:none; min-width:24px; justify-content:center; display:inline-flex; align-items:center; gap:6px; background:none; border:0; padding:0 4px;
+  #uppct:empty { display:none; }
+  .fm-bar .busy { margin:0 -3px; }
+  .busy { flex:none; min-width:16px; justify-content:center; display:inline-flex; align-items:center; gap:6px; background:none; border:0; padding:0;
           height:34px; color:var(--muted); font-size:13px; font-variant-numeric:tabular-nums; cursor:default; }
   .busy:hover { background:none; }
   .busy.up { cursor:pointer; color:var(--text); }