Add wiki fragment and translation to UpdateCheck

src/NzbDrone.Core/HealthCheck/Checks/UpdateCheck.cs

@@ -68,12 +68,9 @@ namespace NzbDrone.Core.HealthCheck.Checks
                 }
             }
 
-            if (BuildInfo.BuildDateTime < DateTime.UtcNow.AddDays(-14))
+            if (BuildInfo.BuildDateTime < DateTime.UtcNow.AddDays(-14) && _checkUpdateService.AvailableUpdate() != null)
             {
-                if (_checkUpdateService.AvailableUpdate() != null)
-                {
-                    return new HealthCheck(GetType(), HealthCheckResult.Warning, "New update is available");
-                }
+                return new HealthCheck(GetType(), HealthCheckResult.Warning, _localizationService.GetLocalizedString("UpdateAvailable"), "#new-update-is-available");
             }
 
             return new HealthCheck(GetType());

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

@@ -484,6 +484,7 @@
   "UnsavedChanges": "Unsaved Changes",
   "UnselectAll": "Unselect All",
   "UpdateAutomaticallyHelpText": "Automatically download and install updates. You will still be able to install from System: Updates",
+  "UpdateAvailable": "New update is available",
   "UpdateCheckStartupNotWritableMessage": "Cannot install update because startup folder '{0}' is not writable by the user '{1}'.",
   "UpdateCheckStartupTranslocationMessage": "Cannot install update because startup folder '{0}' is in an App Translocation folder.",
   "UpdateCheckUINotWritableMessage": "Cannot install update because UI folder '{0}' is not writable by the user '{1}'.",