add button to toggle the optional theme when viewing the docs; fixes #9764
regenerate minified docs JS & CSS
Merge branch 'master' into docs-theme-toggler

Conflicts:
	docs/assets/css/docs.min.css
update explanatory comment about iOS date/time inputs bug

Per:
* http://jsbin.com/purer/2/edit
* https://github.com/cvrebert/bs-css-hacks/blob/6e8aa78384a005b007fc45327c9516dcf6ec0f30/README.md#ios-temporal-input-line-height
Thanks @mdo <3

[skip sauce] [skip validator]
show proper error message when viewing Customizer in IE8

Closes #13090.
[skip sauce]
move it to the sidebar
Reset the padding on radio/checkbox labels in form-inline
Merge branch 'master' into docs-theme-toggler

Conflicts:
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	docs/assets/css/docs.min.css
	docs/dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.min.css
Merge pull request #13463 from twbs/docs-theme-toggler

add button to toggle the optional theme when viewing the docs
clarify and danger-ify affix docs usage requirements, per #10235
Merge branch 'master' of github.com:twbs/bootstrap
tighten up callouts and remove backgrounds
more callout tweaks
don't change code bg on callouts
grunt dist for docs
clarify
Merge pull request #13651 from twbs/ios-temporal

update explanatory comment about iOS date/time inputs bug
Merge pull request #13626 from twbs/address-13090

show proper error message when viewing Customizer in IE8