Fixes #12738 again: use max-device-width instead of max-width for .navbar-collapse height in landscape devices

References #14010

fixing duped IDs

fix ALL the duped IDs.

make example id match actual id

Now we are on par with what we have on the gh-pages dist/ folder.

Fixes #13991

[skip sauce]

[skip sauce] [skip validator]

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...at least if you're a writing nerd :P "Bootstrap ships with vanilla CSS, but *its* source code..."

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.bs-docs-navbar class doesn't seem to be used anywhere at all

Revert a991cd57.

https://github.com/twbs/bootstrap/commit/32bde78e1996a92e6b801e1f4a475d5ab48685f8

Moved the inset box-shadow to .site-wrapper in order to keep the shadow at the edges even if content exceeds viewport and needs scrolling.

Will hopefully revert this reversion and land a fully-working version of UMD in v3.3.0.

Revert "some changes from #13801 - add strict mode back and =="
This reverts commit 2b302f69.

Revert "Fix regression of #10038 introduced by #13772"
This reverts commit e9d6756a.

Revert "MD/CommonJS/Globals #12909"
This reverts commit 1c6fa901.

Revert "address #13811"
This reverts commit f347d7d9.

Conflicts:
    js/carousel.js
    js/collapse.js
    js/dropdown.js
    js/modal.js
    js/tab.js
    js/tooltip.js