🔧 🚩 🚧 Finished the components variable replace content.

assets/css/_common/components/third-party/gitter.scss

@@ -0,0 +1,7 @@
+@if $gitter_enable {
+  .gitter-open-chat-button {
+    $alignment : sidebar-toggle-alignment(false);
+    #{$alignment[0]}: auto !important;
+    #{$alignment[1]}: 10px !important;
+  }
+}