Feat: Add pass-trough function for zipManagerBtn

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/MainToolBar.java

@@ -407,6 +407,10 @@ public class MainToolBar {
         return resetCameraBtn;
     }
 
+    public Button getZipManagerBtn() {
+        return zipManagerBtn;
+    }
+
     public HBox getToolBar() {
         return toolBar;
     }

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/MainWindow.java

@@ -1202,6 +1202,14 @@ public class MainWindow extends Application {
         return mainToolBar.getOpenBtn();
     }
 
+    public void showZipManager() {
+        controller.showZipManager();
+    }
+
+    public Button getZipManagerBtn() {
+        return mainToolBar.getZipManagerBtn();
+    }
+
     public VertexClickHandler getClickHandler() {
         return clickHandler;
     }