* Mention dropping of .checkbox/.radio

* copy edirts

See http://caniuse.com/#feat=pointer-events

Suggestion to use consistent information about running docs locally

Idea is about to leave Ruby/Bundler commands in tooling section/readme/space, and on main readme use npm scripts syntax.

Fix jumping modal when the viewport is resized

Remove speculations about jQuery 3

Fix migration button stateful link

Fix unwanted body padding when a modal is opened

Shouldn't this be 'output' ?

Fixes https://github.com/twbs/bootstrap/issues/23773

Adds accessibility notes to breadcrumbs

See mishoo/UglifyJS2#2198

https://crbug.com/568691 has been succeeded by https://crbug.com/749848

_adjustDialog should be called when the modal is first displayed to prevent it jumping position when the viewport is resized

Use a virtual scrollbar as this is simpler than having a real one (overflow: scroll doesn't seem to work in Phantom), and disable it for the new test.

One test has also been altered to prevent erroneous fails when other inline styles are added to the body (e.g. overflow).

Prevents the test from failing