Delete annotation warning message for video, audio, oral history

[kimpham54]

Depends on #132 (comment)

when no verbose messaging is turned on

I create an annotation —> Save/Cancel
Annotation is created --> no message
I edit an annotation --> Save/Cancel
Annotation is edited --> no message
I delete an annotation —>" This annotation will be deleted. This action cannot be reversed. Are you sure?” with “Delete” and “Cancel” as the buttons
Annotation is deleted —> no message

when verbose messaging is activated

I create an annotation —> Save/Cancel
Annotation is created --> confirmation + JSON output
I edit an annotation --> Save/Cancel
Annotation is edited --> confirmation + JSON output
I delete an annotation —> "This annotation will be deleted. This action cannot be reversed. Are you sure?” with “Delete” and “Cancel” as the buttons
Annotation is deleted —> confirmation, PIDs of deleted objects

[kstapelfeldt]

right now, no easy way to implement, but it's staying in our wishlist.

[kstapelfeldt]

Audio and Video delete behaviour is still not as described above, but this is a low priority and non insubstantial amount of work. Backburner task for now.

[kimpham54]

Delete annotation library for audio/video doesn't have callback function so it's not straightforward to implement.