What this config does is it either enables or disables lineWrapping,
disabling line wrapping can cause changes that have long lines to simply
be cut off.
With it enabled it will line wrap the text making it easer to read instead
of it being cutoff.
Gerrit 2.8.1 did lineWrapping so bringing this back. But it is set to the
default false so it is not enabled by default in Edit or Diff sections.
We should probaly set it as true in gerrit 2.13.
This also will partially fix bug
https://phabricator.wikimedia.org/T144565
which is filled downstream. Reason why this is partially fixed is because
the pref is not set to true by default and logged out users will still
see no line wrapping.
Bug: Issue 4292
Bug: Issue 2410
Change-Id: I8600778f1068c217e335755a3138e8cb64bc8b3e
ee24b3c547