How to allow non super admin use RTL tester

I wanted my editors & others use RTL tester as well.

This requires a code change, in the single PHP file.
The second line in funtion:admin_bar_rtl_switcher()

should be
if ( ! ((is_super_admin() || is_admin()) && is_admin_bar_showing()) )

instead of the current.
Enjoy

https://wordpress.org/plugins/rtl-tester/