Use enqueue_block_assets, and add note why.

Enqueue_block_editor_assets throws a console error in the block editor when using the iframed editor, and requires use of `enqueue_block_assets` instead. However, this results in assets appearing on the front-end. Wrap code in `is_admin()` to limit scope.

Author: joedolson

src/wp-accessibility-alt.php

@@ -256,11 +256,13 @@ function wpa_add_editor_styles() {
 	add_editor_style( plugins_url( 'css/editor-style.css', __FILE__ ), false, $wpa_version );
 }
 
-add_action( 'enqueue_block_editor_assets', 'wpa_block_editor_assets' );
+add_action( 'enqueue_block_assets', 'wpa_block_editor_assets' );
 /**
  * Enqueue custom block editor styles for WP Accessibility. Used in display of img replacements.
  */
 function wpa_block_editor_assets() {
-	$wpa_version = ( SCRIPT_DEBUG ) ? wp_rand( 10000, 100000 ) : wpa_check_version();
-	wp_enqueue_style( 'wpa-block-styles', plugins_url( 'css/editor-style.css', __FILE__ ), false, $wpa_version );
+	if ( is_admin() ) {
+		$wpa_version = ( SCRIPT_DEBUG ) ? wp_rand( 10000, 100000 ) : wpa_check_version();
+		wp_enqueue_style( 'wpa-block-styles', plugins_url( 'css/editor-style.css', __FILE__ ), false, $wpa_version );
+	}
 }