Use user-agent in all places in fileService.go and make sure user agent box is wide

client/settings.html

@@ -110,7 +110,7 @@
         </label>
         <label for="userAgent" style="display: inline-block;" >
             <span class="label-body">Specify the User-Agent header specified when downloading podcasts</span>
-            <input type="text" name="userAgent" v-model="userAgent">
+            <input type="text" class="u-full-width" name="userAgent" v-model="userAgent">
         </label>
       
         <input type="submit" value="Save" class="button">

service/fileService.go

@@ -28,8 +28,7 @@ func Download(link string, episodeTitle string, podcastName string, prefix strin
 	}
 	client := httpClient()
 
-	req, err := http.NewRequest("GET", link, nil)
-	req.Header.Add("User-Agent", "")
+	req, err := getRequest(link)
 	if err != nil {
 		Logger.Errorw("Error creating request: "+link, err)
 	}