fix: dragging files selects no text; without a drag the names select as before

internal/server/web/static/dnd.js

@@ -50,6 +50,9 @@
       begin();
     }
     d.ghost.style.transform = 'translate(' + (ev.clientX + 12) + 'px,' + (ev.clientY + 10) + 'px)';
+    // What the browser began to select before the drag was told apart goes.
+    const sel = getSelection();
+    if (sel && !sel.isCollapsed) sel.removeAllRanges();
     d.target = null;
     box.hidden = true;
     d.ghost.dataset.hint = '';