Change icons user control panel

Hello,

you can use some custom Css command in order to get or modify this.
First have a look on this tutorial to se how to add custom css command.

Then, in order to guide you, this kind of css command can do the trick :

div.container_html .unwanted_html_imag_class {
    display: none;
}

div.container_html {
    content: url('url-link/new-img.png');
}