UI: Move messages styles to atoms directory

assets/css/scss/index.scss

@@ -8,10 +8,10 @@
 @import "settings/typography";
 
 @import "atoms/buttons";
+@import "atoms/messages";
 
 @import "components/badges";
 @import "components/forms";
-@import "components/messages";
 //@import 'announcement';
 
 @import "layout/topbar";