set app name on X11

src/main/java/com/sparrowwallet/sparrow/MainApp.java

@@ -96,6 +96,6 @@ public class MainApp extends Application {
     }
 
     public static void main(String[] args) {
-        launch(args);
+        com.sun.javafx.application.LauncherImpl.launchApplication(MainApp.class, MainAppPreloader.class, args);
     }
 }

src/main/java/com/sparrowwallet/sparrow/MainAppPreloader.java

@@ -0,0 +1,11 @@
+package com.sparrowwallet.sparrow;
+
+import javafx.application.Preloader;
+import javafx.stage.Stage;
+
+public class MainAppPreloader extends Preloader {
+    @Override
+    public void start(Stage stage) {
+        com.sun.glass.ui.Application.GetApplication().setName("Sparrow");
+    }
+}