* Doc update - remove media-breakpoint-up(xs)

If media-breakpoint-down(xl) is not listed, then media-breakpoint-up(xs) does not need to be listed either.
The above 4 media queries are now aligned with the 4 media-breakpoint-up mixins (just like their media-breakpoint-down counterparts).

* Improve media-breakpoint-up/down docs

Also, move the search code to a separate file.

for clarity/consistency with other similar examples

`<dialog>`, in browsers that support it, has user agent styles of `dialog { display:block; ...} dialog:not([open]) { display:none; }`
by forcing it to `display:block` in the shim, the dialog is shown even when closed. There's no clean way to shim this for non-supporting browsers,
but arguably these browsers would have further problems with pure `<dialog>` usage anyway, and it's up to authors to then use different elements/shims.

Fixes #26235

* Improve code coverage for our Button plugin

* improve coverage for our Alert plugin

* test tooltip update method

* test update and dispose for dropdown

* increase code coverage requirements

Also, add a missing license header in build/workbox.js.

* update docs path from docs/4.0/ to docs/4.1/

* bump version to 4.1.0

* Update redirects to work for 4.1 docs move

* Update docs version switcher to include latest and link to 4.0 docs

* re-run dist

* Update package-lock.json

* Update docs-navbar.html