Remove focus from form region
 

I have a form region under the preview email pane that has 1 combobox and a
few images on.

Currently when I GUI navigate and select different emails, the form region
always shows the text of the combobox highlighted with quite a bright blue,
being the screen highlight color.

I'd like to see what it's like without this automatic selecting and
highlighting in case the users think it's distracting. Is there a way I can
remove focus from the form region so the control doesn't always appear
highlighted?