twbs/bootstrap

Losslessly compress docs images.

Used zopfli 1.0.1, with `zopflipng -m --lossy_transparent -y --iterations=1000`

Before: 23,7 KB (24.352 bytes)
After:  23,5 KB (24.079 bytes)

… preserve behavior under jQuery 3 (#20278)

This code ought to have used .prop instead of .attr in the first place,
but we can't get rid of the attr manipulation now due to backward compatibility constraints.

Refs https://github.com/jquery/jquery-migrate/blob/3.0.0/warnings.md#jqmigrate-jqueryfnremoveattr-no-longer-sets-boolean-properties
Refs #16834

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…20019)

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Ports 0b21f2e to v3

Refs https://bugzil.la/840640
Refs https://webkit.org/b/84635

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Ports 58aca28 to v3

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Tell clean-css to inline source files into sourcemap

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Update devDependencies and gems.

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As this causes non-standard dotted outline on checkboxes/radio buttons
in OS X Firefox

Fixes #19933
Closes #19935

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Backport JS unit test fixes from v4

ScrollSpy unit test: Use single done() in a then() instead of multiple done()s

Fixes test flakiness on OS X Safari and Android when using jQuery 3.
Fixes #20182 more
Refs #20191

Scrollspy test: Allow for async .then() in jQuery 3; fixes #20182

Instead of doing a new assert.async(), just do a single one for the entire test
and let the .then() be async as well.

Update dependencies

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Use shx so that the npm scripts work everywhere the same.

Add Wall of Browser Bugs entry for #20161 (#20183)

Refs https://bugzilla.mozilla.org/show_bug.cgi?id=1282363

docs/_plugins/bugify.rb: Add support for MS Edge UserVoice ideas (#20176)

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Add Wall of Browser Bugs entries for Selectors Level 4 :nth-child() (#20143)

Refs http://caniuse.com/#feat=css-nth-child-of
Refs https://drafts.csswg.org/selectors-4/#the-nth-child-pseudo
Refs https://crbug.com/304163
Refs https://bugzil.la/854148

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https://webkit.org/b/158340 has been fixed

So remove its entry from the Wall.
Refs #20012, #20024
Refs http://trac.webkit.org/changeset/202324

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Add Wall of Browser Bugs entries for #12832 (#20089)

Refs #12832
Refs http://getbootstrap.com/getting-started/#support-sticky-hover-mobile
Refs https://bugs.chromium.org/p/chromium/issues/detail?id=370155
Refs https://bugs.webkit.org/show_bug.cgi?id=158517

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https://crbug.com/460200 has been fixed! (#20090)

So remove its entry from the Wall of Browser Bugs
Refs #15832

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https://bugzil.la/1278000 was marked as dupe of https://bugzil.la/577785

Update Wall of Browser Bugs accordingly.
Refs #19670

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Add Wall of Browser Bugs entry for #19670 for Edge (#20037)

See https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/7787318/
Refs #19670

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