Release 3.0rc1 of the GUI #1437

Job	Run time
linter_gui	8m 52s
linter	47s
unit_tests (1.54, ubuntu-latest)	6m 15s
unit_tests (1.54, macOS-latest)	6m 55s
unit_tests (1.54, windows-latest)	9m 23s
unit_tests (nightly, ubuntu-latest)	1m 36s
unit_tests (nightly, macOS-latest)	1m 47s
unit_tests (nightly, windows-latest)	2m 57s
unit_tests_gui (1.65, ubuntu-latest)	12m 0s
unit_tests_gui (1.65, macOS-latest)	8m 11s
unit_tests_gui (1.65, windows-latest)	14m 47s
unit_tests_gui (nightly, ubuntu-latest)	4m 12s
unit_tests_gui (nightly, macOS-latest)	3m 53s
unit_tests_gui (nightly, windows-latest)	6m 30s
	1h 28m 5s

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