/n new line in imsg/cmsg

The CMSG and IMSG will wrap automatically, but I can see the need for controlling the line break.

A trick you could use is to enter text also on the line for help. But that shows up as a separate paragraph on the MD4 popup message. 

I found that using the help/channel lines changes the line spacing which looks odd. One need for this is creating a list in the message. My case I was trying to copy the format/style of the native error codes where it reads out the pin and module on separate lines.