Fixes 11756: Mention document mode checking ability in IE comaptibility modes

BS3 commits: 9edec7ed2193b0ffdf093188b0a63231bd813c8a
Fixes 11729: Show code snippets on mobile views

BS3 commits: 0bf5202b92d12ee19f65c7aa3bcf25c64835f459
Shorter download text because narrow viewports

BS3 commits: 74408de61901b9bd4b7c1f6632ddebc8d21fb167
prevent horizontal scroll on components

BS3 commits: 5e6f9b9a376bdacc8269ccb1b57c22d8f8f4112c
improve icon display on narrow devices

BS3 commits: 5fdd917918b9470ae3b0ec30ee89c8e20a14c157