Co-authored-by: Mark Otto <markd.otto@gmail.com>

The image is always available over HTTPS anyway

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

This PR removes unsupported browsers from supported tables based on the current `.browserlistrc` config

* Thin out embedded examples borders, rounded their corners
* Fix busted class
* Adjust nesting of .bd-example styles, tweak padding while I'm at it
* combine selectors
* cleanup some margins that always cancel each other out
* Remove redundant universal selector

Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>

This is set automatically to "development" when the local server is running, and to "production" when Hugo builds the site.

The new Chromium-based Edge has been available as a beta for sometime and general availability of the final version is expected to ship from Jan 15. I think it makes sense to add it as a supported browser once it's out of beta.
REF: https://blogs.windows.com/windowsexperience/2019/11/04/introducing-the-new-microsoft-edge-and-bing/

Remove old versions

Fixes page overflow on mobile.

Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>

Not applicable anymore since https://github.com/twbs/bootstrap/pull/29348

The `$sizes` Sass map doesn't exist anymore in `v5`.

This reverts commit cd7e5d11

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Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>

* Fix missing bullets from table of contents top level

* Add .text-muted to toc for lighter bullets

Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>

Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>

* Add utility class for the user-select property

* Docs: Add new page for behavior utility classes - includes user select utility

* Update and rename behaviors.md to interactions.md

* Update sidebar.yml

Co-authored-by: Mark Otto <otto@github.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>
Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>

* Added wrapping class for rounded utils

Tweak /utilities/borders/#border-radius #29343



* Remove the extra div.

Co-authored-by: XhmikosR <xhmikosr@gmail.com>