Hello,
Thank you for your answer, admin_bar_menu worked well for me!
But there is some problem with opacity… if I change opacity for #lightGallery-outer it changes opacity of the whole plugin… I mean, the image is transparent too, not only background.
https://www.dropbox.com/s/f8u9lpntk2joo2a/2015-04-02_234428.png?dl=0
