I’ve just installed Geany, have downloaded the Geany themes and have selected the Solarized (Dark) scheme. Now I would like to be able to adjust the colors of the surrounding elements of Geany, the toolbar, the side panel, the terminal panel and so on, but I cannot figure out a way to do this. I had hoped that editing `geany.css` might be involved, but it’s not clear (to me, at least!) if this is the case.