This is a little bit hackish solution to your problem.
Look for /assets/modules/quick_edit/output.class.inc.php file on your MODx installation folder.
Open the file with any text editor that you prefer.
On line 294-297 will look like this
// If the top html hasn't already been added to the page, do it now
if(strpos($output, $html_top) === false) {
$output = preg_replace('~(<body[^>]*>)~i', '\1'.$html_top, $output);
}
Change it to this
// If the top html hasn't already been added to the page, do it now
//if(strpos($output, $html_top) === false) {
// $output = preg_replace('~(<body[^>]*>)~i', '\1'.$html_top, $output);
//}
This will avoid putting the toolbar tag on your screen.
The only problem will be, there might some javascript error on the page, while the js looking for this corresponding div id, and it couldn’t find the id on the page.
Or you can modify the outputed html tag on line 241-251
$html_top = <<<EOD
<!-- Start QuickEdit toolbar -->
<div id="QE_Toolbar" onmouseup="QE_SetPosition(this);" style="display:none;">
<div id="QE_Toolbar_Header">
<div id="QE_Title">{$_lang['QE_title']}</div>
{$buttons_html}
</div>
{$menus_html}
</div>
<!-- End QuickEdit toolbar -->
EOD;
You can play around with that code.
After you’re done, just overide the file. Remember to make a backup copy for this file first.
USE IT WITH YOUR OWN RISK