Add ability to send bulk messages

[savelmtr]

Thank you for this very useful application.
I use it on my site. But my admin faced with a problem when he had to send messages to 50 users. So, it was the very moment we got that there is no function like 'send messages to all users' or 'send messages to all users in the group'. May be we should add this option to the app?

[tiagocapelli]

Good idea!