Alert plugin - Show list of hosts firing (not changes)

Hi to all. This a request to know if anyone tried to configure the alert plugin to show which hosts are firing the current alerts (I attach an image), not only the alert name firing.

Do not confuse the show options “Recent state changes” and “Current state”. I’m asking about a hybrid between both of them: I don’t want to know the time stamp but the host name.

image

This would be really helpful and I think I should edit the alert plugin itself. Where are stored the default plugins? Thanks in advance and best regards.