Add a rollback (or undo) button

[mdouchin]

I think it could be handy to have a new button next to the replay button, which allows to rollback an event.

See Oslandia/audit_trigger#1 for reference

[mdouchin]

The PR in audit.sql has been merged. I will probably propose a PR for this feature in the gui, when I can find enough time

[lbartoletti]

The PR in audit.sql has been merged. I will probably propose a PR for this feature in the gui, when I can find enough time

@mdouchin Hi Michael, FYI we've just update the plugin to QGIS3. Did you plan to add this feature? :)

Thanks.