Bootstrap Editor Styles

Add this to functions.php

add_filter( 'tiny_mce_before_init', 'twbsg_tinymce_before_init_content_style' );
add_filter( 'mce_css', 'twbsg_bootstrap_editor_mce_css' );
/**
 * TinyMCE Bootstrap Editor Styles for Genesis Theme Framework
 */
function twbsg_bootstrap_editor_mce_css( $mce_css ) {
	if ( ! empty( $mce_css ) )
		$mce_css .= ',';
	$mce_css .= get_stylesheet_directory_uri() . '/css/bootstrap.min.css';
	return $mce_css;
}
function twbsg_tinymce_before_init_content_style( $mce ) {
    // $mce['body_class'] = ' container-fluid';
    $mce['content_style'] = "#tinymce {margin: 10px 15px!important;}";
    return $mce;
}