Add ability to send event data from an event #351
Description
When triggering arbitrary events from the grid, it is helpful to be able to send info to a prop specifically designed for it, rather than trying to make it fit into another prop (cellValueChanged, cellRendererData).
The two mentioned are specific to cells or row data, however, it might be beneficial to listen to columnMenu opened and trigger a specific event to display a custom dash modal.
For my purposes, I am going to use gridPreDestroyed to check if data is currently unsaved. Listening to cellRendererData when its not a cell but the whole grid doesnt make sense. This would also muddy up other prop functions that I have for these events.