Sort devices by domain/subdomain

Currently, devices are sorted alphabetically, which is nice, but produces very weird results if you have proper naming convention implemented, like 4 device's in 3 different locations which all are named pdu1/2/3/4 , but have a different subdomain name. They all get sorted weirdly then....

Can we implement sorting in a way like this: https://stackoverflow.com/questions/28231256/sort-subdomains-based-on-domains