The current nightly shows the things to come for the new simutrans graphical user interface. Apart from the focus, which allows near fully keyboard operation of all dialogues, there is now a stick button in the window title. Sticky windows will not close on backspace: very helpful to get rid of error messages during lengthy management operations. Or to have always a map window open.

And the new GUI allows even for skinable scrollbars. Here is a screenshot of a different theme at work.