Bug Watcher Issue Watchers Custom Field

Bug Watcher allows you to manage issue watchers when creating or editing issues. Special watchers are supported

Find the field type in Custom Fields.

Manage issue watchers when creating or editing issues.

Optionally Notify User Watchers 

User watchers may be sent a notification about the fact that they were added to the watcher list of an issue.

The notification email is a user friendly message about becoming watcher.