CSS refactoring.

assets/styles/configuration/elements/_channel-tabs.scss

@@ -0,0 +1,14 @@
+/*
+ * SPDX-FileCopyrightText: 2024 John Livingston <https://www.john-livingston.fr/>
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+@use "../../variables";
+
+livechat-channel-tabs {
+  display: block;
+
+  /* See Peertube sub-menu-h1 mixin */
+  margin-bottom: variables.$sub-menu-margin-bottom;
+}