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Merge pull request #303 from plux/hn/disable-chat-tab-close-button #775

Job	Run time
test (ubuntu-latest, 28.1)	39s
test (macos-latest, 28.2)	4m 48s
test (ubuntu-latest, 30.2)	46s
test (macos-latest, snapshot)	3m 16s
test (macos-latest, 30.2)	5m 19s
test (windows-latest, 28.1)	1m 36s
test (ubuntu-latest, snapshot)	35s
test (windows-latest, 28.2)	1m 41s
test (windows-latest, 30.2)	1m 22s
test (windows-latest, 29.4)	1m 23s
test (ubuntu-latest, 29.4)	36s
test (macos-latest, 29.4)	3m 37s
test (ubuntu-latest, 28.2)	43s
test (windows-latest, snapshot)	2m 48s
test (macos-latest, 28.1)	5m 17s
	34m 26s