Andreas Kling ca93c22ae2 LibGUI: Turn GUI::Application::the() into a pointer ...

During app teardown, the Application object may be destroyed before
something else, and so having Application::the() return a reference was
obscuring the truth about its lifetime.

This patch makes the API more honest by returning a pointer. While
this makes call sites look a bit more sketchy, do note that the global
Application pointer only becomes null during app teardown.

2020-07-04 16:54:55 +02:00

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