web: provide 'show password' button #22395

Job	Run time
test-unittest	2m 30s
lint-golint	59s
ci-outpost-mark	1s
build-container (proxy)	3m 2s
build-binary (proxy, linux, amd64)	1m 50s
build-container (ldap)	3m 18s
build-binary (proxy, linux, arm64)	2m 4s
build-container (radius)	2m 16s
build-binary (ldap, linux, amd64)	1m 47s
build-container (rac)	2m 22s
build-binary (ldap, linux, arm64)	2m 1s
build-binary (radius, linux, amd64)	1m 58s
build-binary (radius, linux, arm64)	1m 54s
build-binary (rac, linux, amd64)	1m 45s
build-binary (rac, linux, arm64)	1m 55s
	29m 42s

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