Refactor BisqApp - move icon load into ImageUtil

desktop/src/main/java/bisq/desktop/app/BisqApp.java

@@ -253,18 +253,7 @@ private void setupStage(Scene scene) {
         stage.setScene(scene);
         stage.setMinWidth(MIN_WINDOW_WIDTH);
         stage.setMinHeight(MIN_WINDOW_HEIGHT);
-
-        // on Windows the title icon is also used as task bar icon in a larger size
-        // on Linux no title icon is supported but also a large task bar icon is derived from that title icon
-        String iconPath;
-        if (Utilities.isOSX())
-            iconPath = ImageUtil.isRetina() ? "/images/[email protected]" : "/images/window_icon.png";
-        else if (Utilities.isWindows())
-            iconPath = "/images/task_bar_icon_windows.png";
-        else
-            iconPath = "/images/task_bar_icon_linux.png";
-
-        stage.getIcons().add(new Image(getClass().getResourceAsStream(iconPath)));
+        stage.getIcons().add(ImageUtil.getApplicationIconImage());
 
         // make the UI visible
         stage.show();

desktop/src/main/java/bisq/desktop/util/ImageUtil.java

@@ -19,6 +19,8 @@
 
 import bisq.core.locale.Country;
 
+import bisq.common.util.Utilities;
+
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 
@@ -40,6 +42,18 @@ public static ImageView getImageViewById(String id) {
         return imageView;
     }
 
+    public static Image getApplicationIconImage () {
+        String iconPath;
+        if (Utilities.isOSX())
+            iconPath = ImageUtil.isRetina() ? "/images/[email protected]" : "/images/window_icon.png";
+        else if (Utilities.isWindows())
+            iconPath = "/images/task_bar_icon_windows.png";
+        else
+            iconPath = "/images/task_bar_icon_linux.png";
+
+        return getImageByUrl(iconPath);
+    }
+
     private static Image getImageByUrl(String url) {
         return new Image(ImageUtil.class.getResourceAsStream(url));
     }