Make the user styles in the toolbar an editable text box

I like that the menu is a click-and-hold dropdown, but that limits its functionality quite a bit. Could you add an option in the config file to make it a normal dropdown menu with editable text in the textbox at the top?

That way, if we select, for instance, alert-info we can then manually append “text-center” to the text box and have the style that we want without having to open and edit the HTML file itself.

I realize that not all userstyles are compatible with each other, and may confuse some users. This is why I would just like to have this option in the config.