Missing permission check before opening window

[Nedok]

Hi.
It seems like UBI dose not check permission of player before displaying its GUI when button is pressed. Instead relying on the Scene window not being shown to players. This assumption is not holding true when using addons such as DF Scene Enhancement.

Using a new world and the addons:

• Universal Battlemap Importer [1.1.1]
• DF Scene Enhancement [3.3.3]

Player will have access to the Scene tab, therefor access to the button to open UBI GUI.

I do not know if there are any unforeseen risks of players having access to that GUI, as they don't seem to be able to create a scene form there.