[themes] With status bar colors fixed, make our dark theme truly dark #55

Job	Run time
build (22.04, 5, true, OFF, ON, ON, ON, ON, OFF, OFF, ON, false)	2h 1m 32s
build (38, 6, true, ON, OFF, ON, ON, OFF, OFF, ON, OFF, false)	3h 21m 18s
clang-tidy	0s
Run tests (5, ALL_BUT_PROVIDERS)	33m 35s
Run tests (5, POSTGRES)	5m 29s
Run tests (5, HANA)	3m 46s
Run tests (6, ALL_BUT_PROVIDERS)	15m 8s
Run tests (5, ORACLE, 22.04, binary-for-oracle)	14m 30s
	6h 35m 18s

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