To support Group edit and drop-down selection

[Liuhongdan]

I'm using 1.0.134. It's the most beautiful one I've used so far. But found that it's not easy to create different groups and put existing connections into different groups.

Can we add the features that support Group edition, like:
1.create new empty group
2.drag/copy the connections to new groups
3.drop-down list to select groups when creating a connection
4.drop-down list to change/select groups when editing a connection

Thank you.