Closes #16151 by merging a rebased version of it that adds docs and 1 more assertion.

Refs #15947

Closes #15915 by merging it.

X-Ref #15742

cc: @mdo

[Fix Issue #15701] Tooltip/popover destroy docs don't explain the delegation case.

Add to popovers

[skip sauce]

Fixes #15465

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Refs #11410

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Fixes #14950.
Closes #15015 by merging it.

Added apostrophes to 3 words to indicate possession (i.e. ownership of something) instead of plurality (i.e. multiples of something).

Closes #14255

Fix #14224: Correctly document args passed to function vals for `title` & `content` options of tooltips+popovers

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Fixes #14038.

Research supporting this choice of approach:
    https://gist.github.com/cvrebert/68659d0333a578d75372

Why not <button>?
Even with a `tabindex` attribute, they don't gain focus when clicked upon in:
    * Mac OS X Firefox 30.0
    * Mac OS X Safari 7.0.5

Fixes #13874.
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Also capitalize column titles and descriptions.

/cc @mdo