change sidebar button

src/client/styles/scss/theme/antarctic.scss

@@ -84,7 +84,7 @@ html[dark] {
   $text-shadow-sidebar-nav-item-active: 0px 0px 10px #0099ff; // optional
   // Sidebar resize button
   $color-resize-button: $color-reversal;
-  $bgcolor-resize-button: $bgcolor-search-top-dropdown;
+  $bgcolor-resize-button: #fa9913;
   $color-resize-button-hover: $color-reversal;
   $bgcolor-resize-button-hover: lighten($bgcolor-resize-button, 5%);
   // Sidebar contents