Bug fix escape 'about page' is breaking on fullscreen mode [macOS] (#4619)
Bug fix escape 'about page' is breaking on fullscreen mode [macOS] (#4619)

* Remove main window as parent from about window
* Remove previous code to fix 4540

Co-authored-by: Harrison Bronfeld <d1012242c7965d22edb604195aa9a363f4ded51c@Harrisons-MacBook-Air.local>
nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop