refactor: removed MainFXMLController from dependencies

Replaced MainFXMLController-based scene-changing with event-based scene-changing to remove cyclic dependency

src/main/java/ch/zhaw/gartenverwaltung/PlantsController.java

@@ -2,6 +2,7 @@ package ch.zhaw.gartenverwaltung;
 
 import ch.zhaw.gartenverwaltung.bootstrap.AfterInject;
 import ch.zhaw.gartenverwaltung.bootstrap.AppLoader;
+import ch.zhaw.gartenverwaltung.bootstrap.ChangeViewEvent;
 import ch.zhaw.gartenverwaltung.bootstrap.Inject;
 import ch.zhaw.gartenverwaltung.io.HardinessZoneNotSetException;
 import ch.zhaw.gartenverwaltung.models.PlantListModel;
@@ -16,6 +17,7 @@ import javafx.geometry.Insets;
 import javafx.scene.control.*;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
+import javafx.scene.layout.AnchorPane;
 import javafx.scene.layout.VBox;
 import javafx.stage.Modality;
 import javafx.stage.Stage;
@@ -39,6 +41,9 @@ public class PlantsController {
     // TODO: move to model
     private final ListProperty<Plant> plantListProperty = new SimpleListProperty<>(FXCollections.observableArrayList());
 
+    @FXML
+    public AnchorPane plantsRoot;
+
     @FXML
     private VBox seasons;
 
@@ -73,6 +78,8 @@ public class PlantsController {
         stage.initModality(Modality.APPLICATION_MODAL);
         stage.setResizable(false);
         stage.showAndWait();
+        // TODO: change to dialog
+        plantsRoot.fireEvent(new ChangeViewEvent(ChangeViewEvent.CHANGE_MAIN_VIEW, "MyGarden.fxml"));
     }
 
     /**