fix: a smaller frame for the properties button in the path field

internal/server/web/templates/files.html

@@ -20,7 +20,7 @@
   /* The path field, with the folder's properties button inside it on the right. */
   .fm-pathbox { position:relative; flex:1; min-width:200px; display:flex; }
   .fm-pathbox input.fm-path { width:100%; min-width:0; padding-right:40px; }
-  .fm-bar .fm-pathbox .btn.sq { position:absolute; right:3px; top:3px; width:28px; height:28px; border:1px solid transparent; }
+  .fm-bar .fm-pathbox .btn.sq { position:absolute; right:4px; top:4px; width:26px; height:26px; border:1px solid transparent; }
   .fm-bar .fm-pathbox .btn.sq:hover { border-color:var(--border); background:#151a21; }
   .spinner { width:16px; height:16px; border:2px solid var(--border); border-top-color:var(--accent);
              border-radius:50%; animation:spin .7s linear infinite; display:none; }