Web Browser is overlapped by Web Management Console

Create server (for example WF26) -> go to <server_home_folder>/bin -> use add_user.sh to add new Management user -> open server Setting in IDE (double click on server) -> Change User Name and Password with new user credentials in "Management Login Credentials" -> start server -> right click on server -> Show In -> Web Management Console -> see login/password fields -> again Show In -> Web Browser -> both pages are opened in the same time.