License upgrade causes server to go catatonic without warning

A routine license upgrade will cause the server to go into an unresponsive state requiring a restart; however no warning is given about this during the upgrade process.

Ideally this shouldn't require a restart but if it does then the final step of upgrading the license should warn that this operation will cause the server to become unresponsive until a restart is issued. An option for the server to restart itself would be useful too.