dashboard/app: fix up top menu #18471

Job	Run time
old	7m 12s
dashboard	2m 25s
aux	4m 3s
race	9m 32s
gvisor	4m 2s
race_dashboard	4m 15s
arch (presubmit_arch_freebsd)	6m 32s
arch (presubmit_arch_windows)	3m 38s
build	6m 24s
arch (presubmit_arch_netbsd)	3m 43s
arch (presubmit_arch_darwin)	3m 48s
arch (presubmit_arch_linux)	10m 59s
arch (presubmit_arch_openbsd)	3m 45s
arch (presubmit_arch_executor)	3m 15s
	1h 13m 33s

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