There is only an option to Soft Delete accounts from the analyze scenario but not directly via the Cockpit. I'm pretty sure that was possible in the past.
Probably it's more a bug then a feature request
SolarWinds solutions are rooted in our deep connection to our user base in the THWACK® online community. More than 150,000 members are here to solve problems, share technology and best practices, and directly contribute to our product development process.