Large number of series makes the series dropdown unusable
Steps to reproduce
For systems with a large number of series ( > 30000 series ) the dropdown in the admin UI to select the series get's unusable. The page is unresponsive and you are unable to search for the relevant series using this drop down.
I tried this with 8.x and while incredibly slow, it did appear to work. If this still affects you please refile on Github!