handle mode and startup config better

src/main/java/com/sparrowwallet/sparrow/AppController.java

@@ -230,6 +230,9 @@ public class AppController implements Initializable {
         onlineProperty().addListener((observable, oldValue, newValue) ->  {
             Platform.runLater(() -> setServerToggleTooltip(getCurrentBlockHeight()));
         });
+        serverToggle.addEventHandler(MouseEvent.MOUSE_CLICKED, event -> {
+            Config.get().setMode(serverToggle.isSelected() ? Mode.ONLINE : Mode.OFFLINE);
+        });
 
         openTransactionIdItem.disableProperty().bind(onlineProperty().not());
     }

src/main/java/com/sparrowwallet/sparrow/AppServices.java

@@ -84,7 +84,6 @@ public class AppServices {
     private final ChangeListener<Boolean> onlineServicesListener = new ChangeListener<>() {
         @Override
         public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean online) {
-            Config.get().setMode(online ? Mode.ONLINE : Mode.OFFLINE);
             if(online) {
                 restartService(connectionService);
 

src/main/java/com/sparrowwallet/sparrow/MainApp.java

@@ -62,7 +62,7 @@ public class MainApp extends Application {
             }
         }
 
-        if(Config.get().getServerType() == null) {
+        if(Config.get().getServerType() == null && Config.get().getCoreServer() == null && Config.get().getElectrumServer() != null) {
             Config.get().setServerType(ServerType.ELECTRUM_SERVER);
         }
 

src/main/java/com/sparrowwallet/sparrow/preferences/ServerPreferencesController.java

@@ -5,6 +5,7 @@ import com.google.common.net.HostAndPort;
 import com.sparrowwallet.drongo.Network;
 import com.sparrowwallet.sparrow.AppServices;
 import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.Mode;
 import com.sparrowwallet.sparrow.control.TextFieldValidator;
 import com.sparrowwallet.sparrow.control.UnlabeledToggleSwitch;
 import com.sparrowwallet.sparrow.event.*;
@@ -371,6 +372,7 @@ public class ServerPreferencesController extends PreferencesDetailController {
             ConnectionEvent connectionEvent = (ConnectionEvent)connectionService.getValue();
             showConnectionSuccess(connectionEvent.getServerVersion(), connectionEvent.getServerBanner());
             getMasterController().reconnectOnClosingProperty().set(true);
+            Config.get().setMode(Mode.ONLINE);
             connectionService.cancel();
         });
         connectionService.setOnFailed(workerStateEvent -> {