Prevent crash

app/src/main/java/eu/faircode/email/DialogFragmentEx.java

@@ -12,6 +12,15 @@ import static android.app.Activity.RESULT_CANCELED;
 public class DialogFragmentEx extends DialogFragment {
     private boolean once = false;
 
+    @Override
+    public void onStart() {
+        try {
+            super.onStart();
+        } catch (Throwable ex) {
+            Log.e(ex);
+        }
+    }
+
     @Override
     public void onDismiss(@NonNull DialogInterface dialog) {
         sendResult(RESULT_CANCELED);

app/src/main/java/eu/faircode/email/FragmentOptionsSynchronize.java

@@ -280,10 +280,10 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
             cal.set(Calendar.SECOND, 0);
             cal.set(Calendar.MILLISECOND, 0);
 
-            return new TimePickerDialog(getActivity(), this,
+            return new TimePickerDialog(getContext(), this,
                     cal.get(Calendar.HOUR_OF_DAY),
                     cal.get(Calendar.MINUTE),
-                    DateFormat.is24HourFormat(getActivity()));
+                    DateFormat.is24HourFormat(getContext()));
         }
 
         public void onTimeSet(TimePicker view, int hour, int minute) {