Disable auto optimize on always sync

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

@@ -235,6 +235,8 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
                 if (value != current) {
                     adapterView.setTag(value);
                     prefs.edit().putInt("poll_interval", value).apply();
+                    if (value == 0)
+                        prefs.edit().remove("auto_optimize").apply();
                     tvPollBattery.setVisibility(value > 0 && value < 15 ? View.VISIBLE : View.GONE);
                     grpExempted.setVisibility(value == 0 ? View.GONE : View.VISIBLE);
                 }

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

@@ -600,7 +600,10 @@ public class FragmentSetup extends FragmentBase implements SharedPreferences.OnS
         cbAlways.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton v, boolean isChecked) {
-                prefs.edit().putInt("poll_interval", isChecked ? 0 : EntityAccount.DEFAULT_POLL_INTERVAL).apply();
+                int value = (isChecked ? 0 : EntityAccount.DEFAULT_POLL_INTERVAL);
+                prefs.edit().putInt("poll_interval", value).apply();
+                if (value == 0)
+                    prefs.edit().remove("auto_optimize").apply();
             }
         });