Castle Game Engine: Bugfixes: frustum culling and scaled scenes, lights gizmos, macOS – editor and project open, GTK – renaming components

Tl;dr of this: download the latest Castle Game Engine and everything will be perfect! (or, at least: better!) Remember that we follow continuous integration and delivery (right now using GitHub Actions) to continually release new version of the engine, 7.0-alpha.snapshot, after every commit that passes a number of automatic tests. So everything we say in …