In recent times ItemGroup instances have been extended ad hoc to accommodate required features, for example:

Shadows	Font Library	Data view fields	Block bindings	Font size presets

• Shadows – adds a – button to remove the item
• Font Library – adds a suffix/value and chevron to indicate drilldown behavior
• Data view fields – Allows re-ordering, includes button to toggle visibility
• Block bindings: adds a suffix/value and a – button to remove items
• Font size presets – adds a suffix/value and chevron to indicate drilldown behavior

The more this components is arbitrarily customised the more tech debt we create. It would be good to define and implement a modern spec based on the use cases outlined above.