I wanted to put the button to bring up the HTML Editing pane from the View menu into the main toolbar next to the Properties pane button, but since it has no icon, it ends up a rather large text button.

 

So I would like to suggest giving it an icon, and possibly putting it on the toolbar (I know there is a shortcut for it, but I am as usual thinking about new users to whom it might seem useful to have it as readily available in the bar as the properties pane).