Hi kjell.ek,
Please open file "richtexteditor\rtepaint5\html5ui.xml"
Find section below
<panel dock="top" height="24" margin="5,2,0,0" css_text="border:solid #999999 1px; background:#f3f3f3;color:#333333;border-radius:2px; -webkit-border-radius:2px;">
Change it to
<panel dock="top" height="24" margin="5,2,0,0" css_text="border:solid #999999 1px; background:#f3f3f3;color:#333333;border-radius:2px; -webkit-border-radius:2px;display:none">
Regards,
Ken