The getPosition function was simplified with a new function,
getViewportBounds, was added to specifically
tackle the cases where we’re looking for the viewport bounds.

'absolute' and 'fixed' tooltips are now matched against the screen
where other ones are made to fit inside the viewport element.

Fixes #14195
Closes #14226

Closes #16073 by merging it

Increment quick start options to six in readme.md

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Closes #16113
Closes #16114

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Add `.alert-warning` related change to migration doc

avoid unnecessary HTML string building+parsing

Update jspm configuration

Refs #15947

ScrollSpy: Fixed proper nav element selection when scrolling upwards

bootstrap-sass v3.3.2 is broken.
Refs https://github.com/twbs/bootstrap-sass/issues/862
Refs https://github.com/twbs/bootstrap-sass/releases/tag/v3.3.3
Refs https://github.com/twbs/bootstrap-sass/commit/daeb43dcc7b0ab06328acaca0549ee68c039aaa6

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Increment quick start options in readme.md to five

Add Wall of Browser Bugs entry for #16022

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Disable jQuery event aliases when running test suite

rm `visibility` where redundant to `display`

Affix: $('body') => $(document.body)