Customizer: add clearfixes to rows and simplify .bs-customizer-input to .col-xs-4

Increase timeouts in tooltip unit tests to avoid spurious Sauce failures

Fixes #14851

Update Sauce iOS Safari test to iOS 8.0
[skip validator]

[skip validator]

Removed unnecessary new lines that were inconsistent with the current formatting style.

Merge branch 'need-to-activate-animated-progressbar' of github.com:twbs/bootstrap into need-to-activate-animated-progressbar

Conflicts:
	docs/_includes/components/progress-bars.html
	docs/assets/js/src/application.js

bs-commonjs-generator.js: always use forward slashes in the require path.

Refs #14409

Added link to danish translation of docs

Since `path.resolve` is using backslashes on Windows, we ended up with different files. Just replace those with forward slashes.

6314 -> 6140 bytes

[ci skip]

Refs #14409

Docs: Use a 180x180 apple-touch-icon-precomposed.png.

This would only work with transitions but since we disable them for unit tests, this delivers unreliably results.

Fixes #14375.
Closes #14519 by merging it.

Fixes #14167.
Closes #14189 by merging it.

Allow npm package to be resolved via node module resolution

Closes #13563 by merging it.