HTML Bar plugin problem

When using the HTML Bar plugin, if click on the buttons 'font' and 'font color' to create HTML code, the built-in Syntax Checker will display an error.

The "font" element is entirely obsolete in HTML5. It should not be used anymore. This message is displayed up to 5 times.

I suggest making the HTML Bar plugin buttons compatible with the built-in Syntax Checker's rules. Thanks.

Please write your preferred specs. How do you want to change the behavior when you click the font button?