Clicking Cancel or Add to Queue does save them but clicking Render does not.
This is caused by the fact that the GuiRenderSettings are now a popup and no
longer their own screen, so to close them, we need to call its close method, not
close the entire screen.
Previously you'd access the render queue from the render settings screen which
was arguably the wrong way around (e.g. you weren't able to access the queue
when your current keyframes were incorrect even if you only wanted to render
those in the queue).
Now the render button opens the queue which can open a new settings popup. To
save people who don't need the queue from always having to go through it, the
queue will immediately open a new settings popup if does not yet have any jobs.
