Duplicate Custom Friends Groups

[gilana]

Title
Duplicate Custom Friends Groups

Short, concise description of the idea
I'd like to be able to duplicate custom friends groups, then rename and edit them.

Full description of the idea
I'd like to see a button added under the "Your custom friends groups" pane that says "duplicate". When you select an existing group and hit this button, it would make a copy of the selected list and append "copy" to the name. From there, you could use the existing features to rename the list and make changes to the members.
An ordered list of benefits

• Faster creation of new groups that have overlap with existing groups

An ordered list of problems/issues involved

• Not sure what the problems here might be, aside from maybe cluttering the interface a little more.