[RCD] Contact groups

I have been working to add contact groups (database backed) to my roundcube but I am struggling with the task due to the complexities of ajax and lack of documentation.

I have managed with some difficulty to implement the majority of it using the LDAP contact groups code as a starting point, and I am hoping some people here can point me in the right direction to get the last of the elements working correctly.

I can create a new contact group in the database using code based on program/steps/addressbook/save.inc, however I can not figure out how to update the javascript in real time. In the current form, I have to leave the addressbook and return to update it.

What do I add to make it update the display?