Fixes ImageLoading in Settings panel

src/main/java/de/tu_darmstadt/tk/SmartHomeNetworkSim/view/popups/SettingsPopUp.java

@@ -2,7 +2,6 @@ package de.tu_darmstadt.tk.SmartHomeNetworkSim.view.popups;
 
 import java.awt.BorderLayout;
 import java.awt.Rectangle;
-import java.awt.Toolkit;
 
 import javax.swing.JCheckBox;
 import javax.swing.JFrame;
@@ -15,6 +14,7 @@ import javax.swing.SwingConstants;
 import de.tu_darmstadt.tk.SmartHomeNetworkSim.control.ConfigurationController;
 import de.tu_darmstadt.tk.SmartHomeNetworkSim.control.Controller;
 import de.tu_darmstadt.tk.SmartHomeNetworkSim.core.Model;
+import de.tu_darmstadt.tk.SmartHomeNetworkSim.view.util.Utility;
 
 /**
  * PopUp to display and edit the settings
@@ -33,7 +33,7 @@ public class SettingsPopUp extends JFrame {
 		this.config = controller.getControllerConfiguration();
 		
 		setTitle("Settings");
-		setIconImage(Toolkit.getDefaultToolkit().getImage(SettingsPopUp.class.getResource("/images/settings.png")));
+		setIconImage(Utility.loadFile("/images/settings.png"));
 		
 		JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.TOP);
 		getContentPane().add(tabbedPane, BorderLayout.CENTER);