Fix Css problems

css/backoffice/pages/_all.scss

@@ -1,25 +1,11 @@
 /*!
- * Copyright (C) 2013-2020 Combodo SARL
- *
- * This file is part of iTop.
- *
- * iTop is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * iTop is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
+ * @copyright   Copyright (C) 2010-2021 Combodo SARL
+ * @license     http://opensource.org/licenses/AGPL-3.0
  */
 
 @import "base";
 @import "preferences";
 @import "attachments";
-@import "tabularfieldsselector";
 @import "impact-analysis";
 @import "audit";
 @import "data-synchro";

css/backoffice/pages/_tabularfieldsselector.scss

@@ -1,35 +0,0 @@
-/*!
- * @copyright   Copyright (C) 2010-2021 Combodo SARL
- * @license     http://opensource.org/licenses/AGPL-3.0
- */
-
-.ibo-table-preview {
-  margin-top: 20px;
-
-  th {
-    padding: 5px;
-    border-width: 1px 1px 0;
-    border-style: groove groove none;
-    background: $ibo-body-background-color;
-  }
-
-  td {
-    padding-right: 5px;
-    padding-left: 5px;
-    border-width: 0 1px;
-    border-style: none groove;
-  }
-
-  tr:last-child td {
-    border-bottom-width: 1px;
-    border-bottom-style: groove;
-  }
-}
-
-.ibo-preview-header {
-  margin-bottom: 5px;
-}
-
-#form_part_interactive_fields_xlsx, #form_part_interactive_fields_csv, #form_part_interactive_fields_pdf {
-  margin-top: $ibo-panel--spacing-top;
-}