redirecte all subsites for /wp-admin/themes.php

Hi
I have an multi site on https://simplylearn.no
I need an redirects setup so when you go to:

/wp-admin/themes.php on all blogs, sub domain and mapped domains is will go to the front pages of the blog.

An eksampel is:
1) I go to theme edit: http://demono.simplylearn.no/wp-admin/customize.php?theme=coursepress-child&return=%2Fwp-admin%2Fthemes.php
2) I click "exit"
3) Is goes to http://demono.simplylearn.no/wp-admin/themes.php

How do I make it go to http://demono.simplylearn.no/ ?