Explain behavior with no tags

src/NzbDrone.Core/Localization/Core/en.json

@@ -47,7 +47,7 @@
   "ApplicationLongTermStatusCheckSingleClientMessage": "Applications unavailable due to failures for more than 6 hours: {0}",
   "ApplicationStatusCheckAllClientMessage": "All applications are unavailable due to failures",
   "ApplicationStatusCheckSingleClientMessage": "Applications unavailable due to failures: {0}",
-  "ApplicationTagsHelpText": "Sync Indexers to this application that have one or more matching tags",
+  "ApplicationTagsHelpText": "Sync Indexers to this application that have one or more matching tags. If no tags are listed here, then no indexers will be prevented from syncing due to their tags.",
   "ApplicationTagsHelpTextWarning": "Tags should be used with caution, they can have unintended effects. An app with a tag will only sync with indexers having the same tag.",
   "ApplicationURL": "Application URL",
   "ApplicationUrlHelpText": "This application's external URL including http(s)://, port and URL base",