* Render a solid gutter that can take 3-4 digit line numbers
* Position line numbers absolutely in the gutter
* Add padding to code so that it doesn't wrap into the gutter
Change-Id: I7abb87452ad61808dad32b41c1d2d86b8ababb28
This makes them unselectable in more browsers as the
user-select fix isn't supported everywhere (e.g. Safari).
Bug: T32773
Change-Id: I274632a1055e1f85679fbb29c81629104cc8b222