Make links in message documentation open in a new tab

Authored by Nikerabbit on Wed, May 16, 2:59 PM.

Description

Make links in message documentation open in a new tab

When in middle of translating, it's too easy to accidentally click
a link lose the context which message was open. It's safer to always
open links in message documentation in a new tab.

Change-Id: I4d18c8b3b9cb986b01b1a43f83b373bc94c3e243

Details