Add missing translations for Queue page

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

@@ -324,6 +324,7 @@
   "ExtraFileExtensionsHelpTexts2": "\"Examples: \".sub",
   "FailedDownloadHandling": "Failed Download Handling",
   "FailedLoadingSearchResults": "Failed to load search results, please try again.",
+  "FailedToLoadQueue": "Failed to load Queue",
   "FileDateHelpText": "Change file date on import/rescan",
   "FileManagement": "File Management",
   "FileNames": "File Names",
@@ -653,6 +654,7 @@
   "QualityProfiles": "Quality Profiles",
   "QualitySettings": "Quality Settings",
   "Queue": "Queue",
+  "QueueIsEmpty": "Queue is empty",
   "Queued": "Queued",
   "RSSSync": "RSS Sync",
   "RSSSyncInterval": "RSS Sync Interval",