When working on projects often time 2 minds are better than one.
Currently for a given project, Users can click the dropdown -> select Permissions and provide another users email address to give them access.
But the recipient does not actually get notified that they have just been added to a new project. This requires an additional manual step for the author to notify this user.
The existing UI can be extended to have a message box next to email to send a short message to the recipient. This should also work when sharing a project with a group or group email alias.