Added: Deprecation warning about Drone Factory to front end (#1938)

src/UI/Settings/DownloadClient/DroneFactory/DroneFactoryViewTemplate.hbs

@@ -1,5 +1,8 @@
 <fieldset class="advanced-setting">
     <legend>Drone Factory Options</legend>
+    <div class="alert alert-warning">
+        Drone Factory is deprecated and should be disabled, use Wanted -> Manual Import to manually import arbitrary directories. See <a href="https://github.com/Radarr/Radarr/wiki/Health-Checks#drone-factory-is-deprecated">the wiki for further details</a>.
+    </div>
     <div class="form-group">
         <label class="col-sm-3 control-label">Drone Factory</label>