Hidden "new message" form for managers

[eyalliebermann]

The topics that should be covered are:

1. The feature will be hidden from unauthenticated users
2. A character limit for title should be defined in the form
3. A signup process is not part of the task, it will be done manually by admins for now
4. Task - User relation is an unresolved matter, we don't want managers to remember passwords