I added the link patch separately for now since I'm not sure if everyone agrees with that change. Personally, I feel like we should keep the link.
I also marked the custom Bootstrap code with a comment // Bootstrap specific changes start/end.
BTW, https://github.com/twbs/bootstrap/pull/14790/files?w=false since I kept the original file's indentation.
/CC @mdo @cvrebert @hnrch02