This was missing since the Hugo switch (d95d3002).

* Update bs-custom-file-input.min.js to v1.3.2.
* Update anchor.min.js to v4.2.0.

* Remove about generated button of file form
* Remove and merge layout examples of custom forms
* Clarify id/for
* Change some spacing classes for consistency

- Remove unsupported browsers fixes
- More consistent comment blocks
- Reorganise order of some blocks
- Add height fix for date/month/week/time inputs (#18842)
- Remove redundant type selectors
- Additional resets and theming options for `legend`
- Add date & color inputs to reboot page
- Use the same borders for text search, text inputs, textareas and date inputs
- Move code styling to reboot

Drop `color()`, `theme-color()` & `gray()` functions  in favor of variables. The functions just called a `map-get()` of a map where just the variables were defined. 

Also the `theme-color-level()` now accepts any color you want instead of only `$theme-colors` colors. The first value now is a variable instead of the `$theme-colors` key.

- _navbar.scss for all main navbar code
- new _subnav.scss to move all subnav styles into

domain is now for sale and is triggers warnings in Firefox and Chrome

Dist after adding new utils file