Fix line breaks on add-ons with spaces

BS3 commit e9951385b0507d2f28e332d7d5dcaea41b7e1d41
fix ID of Normalize heading in docs so that the sidenav can find it

BS3 commit 08ab44708d1dd85fc14fbcde3adc9d051903cbb5
Add new callouts to docs. Recess welcome

BS3 commits 6ac063430f9581187a7090f26a3dcd4eca7a4535 and
fe25ebc2af03c9a81cb0f9879a49d387a6a2904e
Add new callouts to docs. fix "Data attributes" link in JS docs sidenav

BS3 commits 6ac063430f9581187a7090f26a3dcd4eca7a4535 and
534ba060beb314e85a457c1fc43c21a911ee35d7