Delete all messages from the mail

[boii#0582]

Put an option that would delete all the messages from mail at the same time and to avoid doing it one by one when there are several messages. 

[Lyrialas#8499]

There is already an option to delete all mails and activity reward messages at once: t!mail delete

I also suggested in the Tatsu server to add a command/option which allows to delete only all reward messages.

 

[boii#0582]

ah aight, i hadn't seen thanks for info !