Extending a field group between classes in UI

[#1]

Description - When a field group is created for a specific class (lets say individual profile class), this field group by default wont be available for experience event class. where as we can extend the field group to experience event class through API. it will be beneficial to have this configuration done in UI.

Why is this feature important to you - it is very useful to use the same field group for both individual profile class and experience event class. and this is possible now through API, but not UI.

How would you like the feature to work - kind of a toggle button to extend the field group.

Current Behaviour - currently it can be done through API, but not UI.