Fixed the invisible scrollbar when navigating the tabler preview in dark mode. (#1942)

src/scss/mixins/_mixins.scss

@@ -15,7 +15,7 @@
 
 @mixin scrollbar($color: var(--#{$prefix}body-color-rgb)) {
   #{if(&, "&", "*")} {
-    scrollbar-color: rgba(var(--#{$prefix}scrollbar-color, var(--#{$prefix}body-color-rgb)), .16) transparent;
+    scrollbar-color: rgba(var(--#{$prefix}scrollbar-color, var(--#{$prefix}body-color-rgb)), .16);
   }
 
   #{if(&, "&", "*")}::-webkit-scrollbar {