Ticket #49610: 49610-2.patch

src/wp-content/themes/twentytwenty/assets/css/editor-style-block-rtl.css

@@ -30 +30 @@
         font-size: inherit;
 }
 
-.block-editor-block-list__empty-block-inserter .block-editor-inserter__toggle:not(:hover):not(:focus),
-.block-editor-default-block-appender .block-editor-inserter .block-editor-inserter__toggle:not(:hover):not(:focus) {
-        color: inherit;
-}
-
-
 /* Fonts ------------------------------------- */
 
 /*

src/wp-content/themes/twentytwenty/assets/css/editor-style-block.css

@@ -30 +30 @@
         font-size: inherit;
 }
 
-.block-editor-block-list__empty-block-inserter .block-editor-inserter__toggle:not(:hover):not(:focus),
-.block-editor-default-block-appender .block-editor-inserter .block-editor-inserter__toggle:not(:hover):not(:focus) {
-        color: inherit;
-}
-
-
 /* Fonts ------------------------------------- */
 
 /*

src/wp-content/themes/twentytwenty/functions.php

@@ -555 +555 @@
                 )
         );
 
+        add_theme_support( 'editor-styles' );
+
         // If we have a dark background color then add support for dark editor style.
         // We can determine if the background color is dark by checking if the text-color is white.
         if ( '#ffffff' === strtolower( twentytwenty_get_color_for_area( 'content', 'text' ) ) ) {