3693: Allow configuration of default "Ship It!" review message

c**@junxbl****** (Google Code) (Is this you? Claim this profile.)
What version are you running?

What's the URL of the page this enhancement relates to, if any?
the review page (i.e. r/###)

Describe the enhancement and the motivation for it.
it'd be great if we could change the default message used when pressing the "Ship It!" button. 

What operating system are you using? What browser?
Mac OS 10.10.1, Chrome 39.0.2171.71

Please provide any additional information below.