fix: no arrow on the sorted column

internal/server/web/templates/files.html

@@ -48,7 +48,6 @@
   /* Sortable headers: a click sorts by the column, a second one turns it round. */
   table.fm th.srt { cursor:pointer; user-select:none; white-space:nowrap; }
   table.fm th.srt:hover { color:var(--text); }
-  table.fm th.srt i { font-style:normal; display:inline-block; width:12px; margin-left:4px; color:var(--accent); font-size:10px; }
   table.fm .c-sz { width:120px; }
   table.fm .c-mt { width:160px; }
   table.fm .c-act { width:160px; }
@@ -212,8 +211,8 @@
     <table class="fm">
       <thead><tr>
         <th style="width:28px"><input type="checkbox" id="all"></th>
-        <th class="srt" data-sort="name">Имя<i></i></th><th class="sz c-sz srt" data-sort="size">Размер<i></i></th>
+        <th class="srt" data-sort="name">Имя</th><th class="sz c-sz srt" data-sort="size">Размер</th>
-        <th class="sz c-mt srt" data-sort="mtime">Изменён<i></i></th><th class="c-act"></th>
+        <th class="sz c-mt srt" data-sort="mtime">Изменён</th><th class="c-act"></th>
       </tr></thead>
       <tbody id="list"></tbody>
     </table>
@@ -354,12 +353,6 @@
       return (d || byName(a, b)) * s.dir;
     });
   }
-  function showSort() {
-    const s = getSort();
-    document.querySelectorAll('table.fm th.srt').forEach(th => {
-      th.querySelector('i').textContent = th.dataset.sort === s.by ? (s.dir > 0 ? '▲' : '▼') : '';
-    });
-  }
   document.querySelectorAll('table.fm th.srt').forEach(th => th.onclick = () => {
     const s = getSort(), by = th.dataset.sort;
     // A new column starts the way it is most often wanted: names A to Z,
@@ -369,7 +362,6 @@
   });
 
   function render() {
-    showSort();
     const tb = $('list'); tb.innerHTML = '';
     updateSel();
     for (const e of sorted()) {