How to deal with transient events ?

[freddidierRTE]

What to do for example when a card is send and delete a few seconds later . The user get alarmed , but it can happen that he see nothing because is just deleted , so it does not know why he was alarmed

Today we can have for example the following behavior in case of update :

Operator2_fr has sound enabled for "Alarm", operator1_fr send a card with severity "Alarm", operator2_fr sound is played when receiving the card and repeating, operator1_fr edit the card changing severity to "Information", operator2_fr received the updated card but sound is still repeating

We need to thing a way to deal with these transient events

[freddidierRTE]

linked with #1919