WebUI: don't disable combobox for file priority

Closes #17794.
PR #17797.

src/webui/www/private/scripts/prop-files.js

@@ -182,7 +182,6 @@ window.qBittorrent.PropFiles = (function() {
         select.set('id', 'comboPrio' + id);
         select.set('data-id', id);
         select.set('data-file-id', fileId);
-        select.set('disabled', is_seed);
         select.addClass('combo_priority');
         select.addEvent('change', fileComboboxChanged);
 
@@ -204,9 +203,6 @@ window.qBittorrent.PropFiles = (function() {
 
         if (parseInt(combobox.value) !== selectedPriority)
             selectComboboxPriority(combobox, selectedPriority);
-
-        if (combobox.disabled !== is_seed)
-            combobox.disabled = is_seed;
     };
 
     const selectComboboxPriority = function(combobox, priority) {