as role="menu" is a very specific (and strict) ARIA pattern for
desktop-like application menus, and our dropdowns are often used
as pure navigation dropdowns, this change abandons ARIA menus for
a more open-ended and light-weight approach
(see http://heydonworks.com/practical_aria_examples/#submenus and
http://www.w3.org/WAI/tutorials/menus/flyout/#improve-screen-reader-support-using-wai-aria)
note that in dropdown.js, switched to now target ``.dropdown-menu``
instead of ``role["menu"]`` - this also prevents bootstrap scripts
from "bleeding" into non-bootstrap components on the same page.
also removed the ``role=["listbox"]`` part, which appears to be
vestigial/unused (only place in bootstrap that uses that
role are carousels, and their key handling is done separately)
Overall logic for this test appears broken, possibly relating to an
older version of Bootstrap that did not require explicit
`data-toggle="button"` on single toggle buttons?
Fix for problem that emerged from #16226 (`.active` class not actually
being applied) and expansion of the script to also correctly handle
keyboard interaction with checkboxes in `data-toggle="button"` groups
Currently, auto placement is using the container dimensions (if provided) or the element's parent to determine where to open the tooltip:
```javascript
var $container = this.options.container ? $(this.options.container) : this.$element.parent()
var containerDim = this.getPosition($container)
```
This is quite broken in fact, because the parent element could be just a small div outside the element for example, leading in a totally random placement (placing the tooltip on top even if there's no room). And the container can also be outside of the viewport.
This fix simply uses the viewport instead, that's the purpose of the viewport actually, to position the tooltip.
So the auto placement should use it to find where there's more room.
By default this is body, which is good.
To ensure that we don't accidentally use any of the aliases.
This should prevent any future regressions from #12761.
Also updates the test suite since it now can't use these aliases either.
