Allow watchers to change ticket status

Hello, I think it would be a nice feature to have the option to allow watchers to chance ticket status when submiting a follow up via GLPI.

In my company sometime a ticket needs to have a green light of a third party (we've not yet fully implemented the approval module) or add relevant information to a ticket.

The way it works today is that if said user replies via e-mail GLPI will change the status back do processing but if they do via GLPI page, even if they uncheck the pending button, status won't change.