implement bold, as it is used by notifications_popup

api/src/Html.php

@@ -995,6 +995,17 @@ egw_LAB.wait(function() {
 		return '<a href="'.self::htmlspecialchars($url).'" '.$options.'>'.$content.'</a>';
 	}
 
+	/**
+	 * representates a b tag (bold)
+	 *
+	 * @param string $content of the link, if '' only the opening tag gets returned
+	 * @return string the html
+	 */
+	static function bold($content)
+	{
+		return '<b>'.($content?$content.'</b>':'');
+	}
+
 	/**
 	 * representates a hr tag (horizontal rule)
 	 *