How can I hide inactive client locations?

Unfortunately, there isn't a way to hide the inactive locations.

Some options to help re-organise your client locations are - 

• Putting a 'Z' in the front of the inactive location so it goes down the bottom of the client tree.
• Or you can make an admin client call 'inactive client' - then move all the inactive locations to this client and they will not be in that service location anymore.