Don't terminate GLFW when last window is closed #449

Job	Run time
build-and-test (3.10, ubuntu-latest)	7m 37s
build-and-test (3.10, windows-latest)	4m 31s
build-and-test (3.10, macos-13)	2m 54s
build-and-test (3.10, macos-14)	3m 24s
build-and-test (3.11, ubuntu-latest)	6m 34s
build-and-test (3.11, windows-latest)	3m 57s
build-and-test (3.11, macos-13)	6m 31s
build-and-test (3.11, macos-14)	2m 59s
build-and-test (3.12, ubuntu-latest)	6m 33s
build-and-test (3.12, windows-latest)	4m 10s
build-and-test (3.12, macos-13)	5m 36s
build-and-test (3.12, macos-14)	3m 15s
build-and-test (3.13, ubuntu-latest)	6m 51s
build-and-test (3.13, windows-latest)	4m 47s
build-and-test (3.13, macos-13)	5m 21s
build-and-test (3.13, macos-14)	3m 21s
	1h 18m 21s

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