Grouping Bubbles

I am using a whole buch of bubbles. However, finding the right one in this huge list is tricky.

It would be great if I could create bubble groups and sort the bubbles.

Examples:

• work vs private
• client group which contains a bubble for each projekt team at the client
• internal bubbles vs. external bubbles.

In the bubbles area it schould then be easy to filter all available bubbles and display only bubbles from a selected group.
Such a group sould also be made available for the favorits section.