Allow Private Messages without body text
Quoted from Feedback About This Website:
If you attempt to send a message without a body a generic error message is displayed, saying "There was an error sending that message, please try again".
There are many situations where a message may not be long enough to warrant body.
Something like: "Will be a few minutes late to the GA tonight"
So, I feel this should not cause an error. At the least, however, this error should be specific to the problem "Please fill out the body", etc
Pivotal tracker: https://www.pivotaltracker.com/story/show/20153557