[4.0] users groups margin (#34860)

This PR fixes a bug in RTL as shown in the images by using logical css properties instead of adding additional rtl specific classes.

Author: brianteeman

administrator/templates/atum/scss/pages/_com_users.scss

@@ -23,7 +23,7 @@
 
   #fieldset-groups {
     .controls {
-      margin-left: 2rem;
+      margin-inline-start: 2rem;
     }
   }
 }