Incompatibility with Views Slideshow Galleria

There is a CSS rule in this module that makes Views Slideshow Galleria implementations unusable. I'm using the Toolbar as a simple administration menu and I noticed that Galleria doesn't show up for authenticated users with an admin toolbar. I spent almost an hour to find the problem:

div.hidden {
  display: none;
}

Please consider to modify as following:

div#toolbar-toolbar div.hidden {
  display: none;
}