overhaul gui icons + settings

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

@@ -1,10 +1,13 @@
 package ch.zhaw.gartenverwaltung;
 
 import ch.zhaw.gartenverwaltung.types.HardinessZone;
+import javafx.beans.property.BooleanProperty;
+import javafx.beans.property.SimpleBooleanProperty;
 
 public class Settings {
     private HardinessZone currentHardinessZone = HardinessZone.ZONE_8A;
     private static Settings instance;
+    private final BooleanProperty showTutorial = new SimpleBooleanProperty(false);
 
     static {
         instance = new Settings();
@@ -23,4 +26,16 @@ public class Settings {
     public void setCurrentHardinessZone(HardinessZone currentHardinessZone) {
         this.currentHardinessZone = currentHardinessZone;
     }
+
+    public void setShowTutorial (boolean showTutorial) {
+        this.showTutorial.setValue(showTutorial);
+    }
+
+    public BooleanProperty getShowTutorialProperty() {
+        return this.showTutorial;
+    }
+
+    public boolean getShowTutorial() {
+        return this.showTutorial.get();
+    }
 }