General "no highlight" setting

It can be boring to edit the buttons of a toolbar one by one to remove the highlight frame.
Could it be possible to add the option in the custom window, where there already is the option "image state", "label state" and "highlight type", rather than only in the button edition window ?

If you want a quick workaround, you could edit the toolbar in a text editor, since they're all XML now. I haven't looked at this particular setting before but you can probably do the whole toolbar at once using search and replace.