SONAR-15601 Clarify that QualityGate permissions can be delegated to a group

sonar-core/src/main/resources/org/sonar/l10n/core.properties

@@ -1736,8 +1736,8 @@ quality_gates.status=Quality Gate status
 quality_gates.help=A Quality Gate is a set of measure-based, Boolean conditions. It helps you know immediately whether your projects are production-ready. Ideally, all projects will use the same quality gate. Each project's Quality Gate status is displayed prominently on its homepage.
 quality_gates.permissions=Permissions
 quality_gates.permissions.help=Users with the global "Administer Quality Gates" permission and those listed below can manage this Quality Gate.
-quality_gates.permissions.grant=Grant permissions to more users
-quality_gates.permissions.search=Search users by login or name:
+quality_gates.permissions.grant=Grant permissions to a user or a group
+quality_gates.permissions.search=Search users by login or name, and groups by name:
 
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