Better branch delete confirmation (#3915) #6402

Job	Run time
build	1m 8s
Integration Tests - git 2.20.0	1m 34s
ci - ubuntu-latest	42s
Integration Tests - git 2.22.5	1m 18s
ci - windows-latest	2m 15s
Integration Tests - git 2.23.0	1m 16s
Integration Tests - git 2.25.1	1m 27s
Integration Tests - git 2.30.8	1m 21s
Integration Tests - git latest	1m 16s
check-codebase	22s
lint	32s
check-for-fixups	0s
check-required-label	0s
upload-coverage	0s
	13m 11s

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