Trigger an event when plus/minus sign on Outline Symbols bar is clicked
Currently, it is impossible to detect when a plus/minus button within Outline Symbols bar is clicked. It would be nice to have this functionality introduced.
There are already events that are capturable using Ribbon XML that serve similar purpose: OutlineShowDetail and OutlineHideDetail.
However, those events are triggered ONLY when Show/Hide Detail buttons are clicked within Data Ribbon. They are NOT triggered when plus/minus sign is clicked.