macOS: main window shows inside fullscreen if started from fullscreen app

If you start the app from an full screen app, e.g. Intellij IDEA, then the main window is shown inside the fullscreen space, instead of shown in desktop space as normal.

The behavior is correct in 0.3.x, when using App.init() and App.start() separately.

Reproduce the issue by starting the app from a fullscreen application such as IntelliJ IDEA. Compare the current startup behavior with version 0.3.x, where App.init() and App.start() were separate; done means the main window opens in the desktop space rather than inside the fullscreen space.

Written by the indexing model from the issue text.