New: Description for indexer RSS setting

(cherry picked from commit 396406b2174c4876057175e7537a4718eee2abca)

frontend/src/Settings/Indexers/Indexers/EditIndexerModalContent.js

@@ -89,6 +89,7 @@ function EditIndexerModalContent(props) {
                 <FormInputGroup
                   type={inputTypes.CHECK}
                   name="enableRss"
+                  helpText={supportsRss.value ? translate('RSSHelpText') : undefined}
                   helpTextWarning={supportsRss.value ? undefined : translate('RSSIsNotSupportedWithThisIndexer')}
                   isDisabled={!supportsRss.value}
                   {...enableRss}

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

@@ -869,6 +869,7 @@
   "RootFolders": "Root Folders",
   "RottenTomatoesRating": "Tomato Rating",
   "RSS": "RSS",
+  "RSSHelpText": "Will be used when Radarr periodically looks for releases via RSS Sync",
   "RSSIsNotSupportedWithThisIndexer": "RSS is not supported with this indexer",
   "RSSSync": "RSS Sync",
   "RssSyncHelpText": "Interval in minutes. Set to zero to disable (this will stop all automatic release grabbing)",