#823 Triple click selection copy original unwrapped line

[Charlie Smurthwaite]

When triple-clicking, an entire line of text is selected as expected, however when text is wrapped, only one displayed line is selected rather then the original full line.
I believe the original line is stored in full within iTerm, so I would like to see the ability to select the entire line, rather than just a screen-width chunk of it. This is very useful for example when selecting SSH keys to copy as they are often wrapped to several lines.