[Feature request] Add event (or observable) for editing property in edit in place (NwbEditInPlaceComponent)

[ghost]

Hi,

This is not a bug report, just a feature request.
Is it possible to add in "edit-in-place.component.ts" an output for the editing property?
Or a observable which a developer can subscribe.

My use case:
I want to add a button to start the editing of the string. When the edit start I will hide/change the button. When the edit end I restore the button.
There is no event to tell me when the edit start/end.

I will try to submit a PR, but i'm pretty busy :-(