Add missing translations for manage indexers

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

@@ -739,9 +739,11 @@
   "RemotePathMappings": "Remote Path Mappings",
   "Remove": "Remove",
   "RemoveCompleted": "Remove Completed",
+  "RemoveCompletedDownloads": "Remove Completed Downloads",
   "RemoveCompletedDownloadsHelpText": "Remove imported downloads from download client history",
   "RemoveDownloadsAlert": "The Remove settings were moved to the individual Download Client settings in the table above.",
   "RemoveFailed": "Remove Failed",
+  "RemoveFailedDownloads": "Remove Failed Downloads",
   "RemoveFailedDownloadsHelpText": "Remove failed downloads from download client history",
   "RemoveFilter": "Remove filter",
   "RemoveFromBlocklist": "Remove from blocklist",