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.
Basically the result of the Delombok function, except we use IntelliJ's equals,
hashCode and toString and don't re-organize imports (cause that breaks the
preprocessor) and a bunch of manual cleanup was necessary (and half the classes
weren't even converted).
Instead use NativeImage on 1.13+ via newly introduced Image class.
See Image docs for details.
Also fixes an issue with thumbnail taking on 1.13+: The original
ScreenshotHelper method is now async, luckily there's a sync
variant and as a bonus it directly returns a NativeImage so we can
skip having to read the screenshot from disk.
