Revert "fix: 819 single searchable select display label when current value set"

.../funding-agencies/stores/admin-funding-agencies.action.ts

...ures/admin/institution/stores/admin-institution.action.ts

...app/features/admin/license/stores/admin-license.action.ts

.../admin/oauth2-client/stores/admin-oauth2-client.action.ts

.../admin/orgunit/stores/admin-organizational-unit.action.ts

src/app/features/admin/person/stores/admin-person.action.ts

...rvation-policy/stores/admin-preservation-policy.action.ts

src/app/features/admin/role/stores/admin-role.action.ts

...ubmission-policy/stores/admin-submission-policy.action.ts

src/app/features/admin/user/stores/admin-user.action.ts

src/app/features/deposit/stores/deposit.action.ts

...es/organizational-unit/home-organizational-unit.action.ts

.../organizational-unit/stores/organizational-unit.action.ts

...-select/shared-searchable-single-select.presentational.ts

...onal-unit/shared-authorized-organizational-unit.action.ts

...pp/shared/stores/institution/shared-institution.action.ts

src/app/shared/stores/language/shared-language.action.ts

src/app/shared/stores/license/shared-license.action.ts

.../organizational-unit/shared-organizational-unit.action.ts

src/app/shared/stores/person/shared-person.action.ts