The clients and ourselves shouldn't need to open and refresh the "conversations" from the left side menu to check if there are unread messages. Next to conversations it would be great if there could be a number highlighting either how many unread messages you have or that you currently have unread messages, so to prompt you to go in there.
This is a very basic feature for any platform that has conversations or messages so hopefully the team at GHL agrees :)
See my beautiful picture, handdrawn.