Start sync job immediately

app/src/main/java/org/tasks/jobs/JobManager.java

@@ -108,10 +108,8 @@ public class JobManager {
 
   public void syncNow() {
     new JobRequest.Builder(JobCreator.TAG_SYNC)
-        .setExecutionWindow(TimeUnit.SECONDS.toMillis(1), TimeUnit.SECONDS.toMillis(5))
-        .setRequiredNetworkType(NetworkType.CONNECTED)
-        .setRequirementsEnforced(true)
         .setUpdateCurrent(true)
+        .startNow()
         .build()
         .schedule();
   }

app/src/main/java/org/tasks/jobs/SyncJob.java

@@ -33,7 +33,7 @@ public class SyncJob extends Job {
   protected Result onRunJob(@NonNull Params params) {
     synchronized (LOCK) {
       if (preferences.isSyncOngoing()) {
-        return Result.SUCCESS;
+        return Result.RESCHEDULE;
       }
     }