Use a virtual scrollbar as this is simpler than having a real one (overflow: scroll doesn't seem to work in Phantom), and disable it for the new test.

One test has also been altered to prevent erroneous fails when other inline styles are added to the body (e.g. overflow).

Prevents the test from failing

When the body does not overflow (achieved by hiding the QUnit container), it should not be given a margin.

`$npm_config_tmp` is a non-existent variable.
Also, use double quotes since single ones don't work.
Finally, git ignore the temp file.

* Adjust margin for sticky elements on modal

Previously white space was visible to the right of sticky elements due to right padding being added to the body. This fixes #23661.

* Add unit tests for margin of sticky elements on modal

element

make outer `.modal-dialog` pass through events for custom click
handling, counteract it for the actual `.modal-content`

 Generate series of `.table-responsive-*` classes to accomodate overflowing tables in a variety of screen sizes

Rename `.table-inverse`, `.thead-inverse`, `.thead-default` to `.table-dark`, `.thead-dark`, `.thead-light` respectively

(#22414) Rename variables `$table-inverse-bg`, `$table-inverse-accent-bg`, `$table-inverse-hover-bg`, `$table-inverse-border-color`, `$table-inverse-color` to `$table-dark-bg`, `$table-dark-accent-bg`, `$table-dark-hover-bg`, `$table-dark-border-color`, `$table-dark-color` for consistency

Merge branch 'fix/badge-default-colors' of https://github.com/jonwolski/bootstrap into jonwolski-fix/badge-default-colors

1. Instead of having two selectors, we use the `.list-group-item` class and have coverage for list items and anchors.
2. Rather than override all border values, we only override what we set with `border-top`.