Add support for Gutenbeg Editor Styles

[yumyo]

Expected behaviour

Editor styles are correcting recognised, transformed and inlined by Gutenberg.

Actual behaviour

Editor styles are not recognised so the default styles are inlined instead.
This cause having to rely on unnecessary CSS !important rules or additional selectors.

Comments

Solved by commenting out the current editor.css enqueue in app/helpers/assets.php in favour of adding:

/**
 * Support the theme’s editor styles.
 *
 * @link https://developer.wordpress.org/block-editor/developers/themes/theme-support/#editor-styles
 */

add_theme_support( 'editor-styles' );
add_editor_style(  '../dist/styles/editor.css');

to app/setup/theme-support.php

[atanas-dev]

Thank you for the report @yumyo - the issue has been fixed in master.