The actual navbar height is 3.5rem.

* Remove IE compatibility mode meta tag from docs, examples, and JS tests as we no longer support IE9 and IE8
* update and remove some IE bits from our supported browser page
* update introduction.md to match
* reword starter template intro

fixes #18115: move forward with one naming scheme for inversed color schemes, renaming .navbar-dark to .navbar-inverse (matching .card-inverse in the process and restoring v3's inverted class name)

remove current HTML-based symbol, add any missing aria-* attributes

* bower.json, package.json: Extend jQuery version ranges to include v3
* NuGet: Bump jQuery to v3.0.0.1
* Docs+Examples: Update jQuery to v3.0.0
* Use jQuery v3.0.0 for JS unit tests
* Update jqueryVersionCheck to allow jQuery v3.x.x

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/fyi @mdo

Note: The selector in dashboard.css that used .page-header was superfluous
    because the margin that it zeroed was already zero even without that declaration.

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flip things around again, no more base class, try out some new stuff to keep responsive flex grid working

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Now that we don't support IE 8 it's safe to do that.

The table includes a border between the two making this unnecessary

Fixes potential problems with iOS9's new viewport behavior - see for
instance https://forums.developer.apple.com/thread/13510

Move them to footer, and remove duplicate ones.

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Fix #17166

Closes #17319 by merging it.

.visible-xs(-block) => .hidden-sm-up

Fixes #17263.
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Shouldn't really happen, but China for example has blocked Google so this should help.