Add soft wrap option when viewing changes

[drkrynstrng]

A soft wrap option would be useful when viewing changes to files, to avoid having to scroll to the right. I'm specifically thinking of Markdown files here, where sentences or paragraphs can be long.

[GitFiend]

I think this is a good idea. I wonder if this should be the default? Side scrolling is not fun.

[drkrynstrng]

I'm not sure about default or not. In Atom, for example, soft wrap is not on by default. Additionally, like in Atom, there could also be an option to define the preferred line length and then wrap at that point. Thanks!