Dark Mode for WP Dashboard

Adds a smooth dark mode to the default WordPress dashboard interface. The dark mode can be disabled per user in the profile page.

Plugins officially supported:
* Advanced Custom Fields
* Jetpack
* Nested Pages
* Yoast SEO
* Yoast SEO Premium
* Yoast SEO Local
* Yoast SEO News
* Yoast SEO WooCommerce
* WooCommerce
* Better Search Replace
* AIOSEO
* Google Analytics for WordPress by MonsterInsights
* Gutenberg Blocks by Kadence Blocks

Contribution:
Submit custom added style via the wordpress.org forums or via the offical Github repository.
How to compile: sass --watch assets/scss/app.scss assets/css/dark-mode-dashboard.css